WESTERN AUSTRALIAN PERMIAN BRACHIOPODS 
65 
Fig. 4. A-G, L, Fiisispirifer sp. A, CPC 19894, internal mould of ventral valve, x 1. B, CPC 24506, latex cast of 
natural cast of juvenile ventral valve interior, x 1.5. D, CPC 24507, latex cast of natural cast of juvenile ventral 
valve interior, x 1.5. C, CPC 19895, internal mould of ventral valve, x 1. E, CPC 19896. latex cast of ventral valve 
external mould, x I. F, CPC 24508, latex cast of ventral valve external mould, x l.G, CPC 24509, latex cast of 
ventral valve external mould, x 1; note that lateral valve extremities are not preserved. L, CPC 19897, internal 
mould of ventral valve, x 1. H-J, Neospirifer sp. H. CPC 19898, latex cast of natural cast of juvenile ventral valve 
interior, x 1.5. I, CPC 24362, latex cast of ventral valve external mould, x 1. J, CPC 19899, latex cast of 
incomplete ventral valve external mould, x 1.2. K, ICleiothyridina sp., latex cast of natural cast of ?juvenile 
ventral valve interior, x 1.5. 
lar impressions. The specimen is inadequate for 
detailed comment. 
Phylum Mollusca 
Class Bivalvia 
Comments. For completeness, two small frag¬ 
mentary specimens (GSWA F43852-43853) 
from GSWA locality 94217 are figured (Fig. 3Q- 
R). Judging from descriptions and illustrations 
of Western Australian Permian Bivalvia pro¬ 
vided by Dickins (1963), both specimens prob¬ 
ably represent pectinaceans referrable to Avicu- 
lopecten, Etheripecten or a closely related genus 
and appear close to forms from the Callytharra 
Formation. 
ACKNOWLEDGEMENTS 
DrS. K. Skwarko, Geological Survey of Western 
Australia, and Dr J. M. Dickins, Bureau of Min¬ 
eral Resources, Geology & Geophysics, are 
thanked for the loan and collection of specimens 
and the provision of locality data. Ms C. Hansen 
and Ms P. Storer typed the manuscript. A Royal 
Society of Victoria Study Grant assisted with the 
cost of photography, and my work on Late Pal¬ 
aeozoic brachiopod faunas of Western Australia 
is supported by the Australian Research Council 
(Project A 38930315). 
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