A review of the taxonomy and systematics of the echinoid genus Monostychia Laube, 1869

Sadler, T., Kroh, A. &; Gallagher, S.J., March 2016. A review of the taxonomy and systematics of the echinoid genus Monostychia Laube, 1869 Laube, G.C., 1869. Über einige fossile Echiniden von den Murray Cliffs in Süd-Australien. Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften zu Wien, mathematisch-naturwissenschaftliche Classe. Abtheilung I 59, 183–198. [Google Scholar]. Alcheringa 40, xxx–xxx. ISSN 0311-5518

A review of Monostychia, a stratigraphically important clypeasteroid echinoid genus in southern Australian Oligocene/Miocene strata, reveals uncertainty in relation to morphological features used in taxonomy. The result is that the exact systematic position of the genus remains unresolved at subfamily level. Monostychia and its type species, M. australis, are redescribed. Monostychia australis is restricted to the lower to middle Miocene Glenforslan Formation of the Murray Basin. Three other species currently within Monostychia, M. etheridgei, M. loveni and M. elongata, are discussed. Although it is concluded that M. etheridgei belongs in the genus and is a distinct species, the taxonomic position of M. loveni is questioned, and the validity of M. elongata as a separate species from M. australis remains uncertain. This work lays the foundation for further revisions of Monostychia with an expectation that such work will provide the basis for character determination that may be useful across other echinoid taxa.

Tony Sadler [t.sadler@uq.edu.au] and Stephen J. Gallagher [sjgall@unimelb.edu.au], School of Earth Sciences, University of Melbourne, Victoria 3010, Australia; Andreas Kroh [andreas.kroh@nhm-wien.ac.at], Natural History Museum Vienna, Department of Geology and Palaeontology, Burging 7, 1010, Vienna, Austria.     

A double first from Scotland

Hughes, E.J., Camus: Le Premier Homme and La Peste (Glasgow, 1995), 90pp., ISBN 0 85261 447 0

France, P., ed., The New Oxford Companion to Literature in French (Oxford University Press, 1995), 865pp., £30, ISBN 0 19 866125 8     

Book Notes

Michael Ghertman and Margaret Allen, An Introduction to the Multinationals, London, Mac‐millan, for the Institute for Research and Information on Multinationals, Geneva, 1984, pp.143. $11.95 (paper).

June M. Hearn and W.A. Howard, Australian Industrial Relations: Case Studies, South Melbourne, Macmillan, 1984, pp.vi, 136. $12.95 (paper)

Felix Guattari, Molecular Revolution: Psychiatry and Politics, Harmondsworth, Penguin, 1984, pp.308. $10.95 (paper).

W.E. Connolly, The Terms of Political Discourse, second edition, Oxford, Martin Robertson, 1983, pp. 257. $16.50 (paper)

W.E. Connolly (ed.), Legitimacy and the State, Oxford, Basil Blackwell, 1984, pp. 281. $15.95 (paper)

B. Guy Peters, The Politics of Bureaucracy, 2nd edition, London, Longman, 1984, pp. 294. $29.95 (paper)     

POISSON GRAVITY MODELS OF SPATIAL FLOWS*

ABSTRACT The purpose of this paper is to bring together a number of results on spatial flow models, and to reformulate them within a unified probability framework based on Poisson frequencies. To do so, a class of discrete stochastic processes, designated as independent flow processes, is developed which not only yields a complete characterization of Poisson flow frequencies, but also allows a wide range of gravity-type flow models to be formulated within this distributional framework. In particular, a hierarchical classification of 12 model types is developed, and each model type is shown to be characterizable directly in terms of behavioral axioms on independent flow processes.     

ADDITIVE-RATIO MEASURES OF INTERACTMTY IN INPUT-OUTPUT SYSTEMS

ABSTRACT. A general axiomatic framework is developed for analyzing alternative measures of interactivity between the sectors of a given activity system (such as the industrial sectors of an economy). Within this overall framework, we analyze an ordinal class of additive-ratio measures which has been applied to a wide variety of systems, including both economic and ecological systems of activities. Our main result is to show that such measures can be characterized by four interactivity axioms. In addition, a wide variety of alternative measures are compared to additive-ratio measures in terms of this axiom system.     

Regional Weil-Being in Australia Revisited

There have been many studies of regional well-being in Australia, but few match the range of variables and spatial detail employed in this paper. Twenty two socio-economic variables were drawn from the 1986 census and used to classify all 148 Commonwealth electorates. Two procedures were adopted, both based on a principal components analysis, and compared to test the robustness of the classifications generated The first approach summed factor scores to provide a status index, and the second employed Ward's clustering algorithm. The resultant groupings are seen to both complement and reinforce each other and indicate the complex and often subtle variations in well-being across the country.     

Estimation Bias in Spatial Models with Strongly Connected Weight Matrices

This article shows that, for both spatial lag and spatial error models with strongly connected weight matrices, maximum likelihood estimates of the spatial dependence parameter are necessarily biased downward . In addition, this bias is shown to be present in general Moran tests of spatial dependency. Thus, positive dependencies may often fail to be detected when weight matrices are strongly connected. The analysis begins with a detailed examination of downward bias for the extreme case of maximally connected weight matrices. Results for this case are then extended by continuity to a broader range of (appropriately defined) strongly connected matrices. Finally, a simulated numerical example is presented to illustrate some of the practical consequences of these biases.