360 Proceedings of the Royal Society of Victoria. 



Mr. Cresswell found some of his specimens at Cmiewis, about 

 ten miles from Geelong, and also on the Western beach of 

 Corio Bay. The fomier section was described by Mr. Pritchard 

 and myself some years ago. 



The beds are of Barwonian age, and are generally regarded 

 as Eocene. 



According to White, 0. macgillivrayi occurs in shoal water 

 on mud banks, and, judging from the condition of many of 

 the specimens of the fossil I found at Port Campbell, the 

 animals must have been entombed in their burrows. Other 

 fossils are rather rare in the beds containing the crabs, and con- 

 sist mainly of a few brachiopods and mud haunting spatangoids. 



My thanks are due to the Rev. A. W. Cresswell, M.A., for 

 kindly allowing me to examine his specimens and for lending 

 me what I required for comparison and illustration ; while Mr. 

 S. H. Fulton has given me the results of his experience on 

 several points. 



EXPLANATION OF PLATE. 



Ommatocarcinus corioensis, Cresswell sp. 



Fig. 1. — Dorsal view of carapace. The antero-lateral spines are 

 broken, and the front is embedded in hard matrix. 

 From a nodule, Curlewis (Rev. A. W. Cresswell). 



Fig. 2. — Dorsal view of another specimen to show the front, 

 anterior margin and spine. The specimen is some- 

 what crushed, and the posterior third of the 

 carapace is wanting. The carapace is slightly tilted 

 backwards to bring the front into view. From 

 Two-Mile Beach, Port Campbell. 



Fig. 3. — Another specimen showing the left eye-stalk which is 

 broken. From a nodule, Curlewis (Rev. A. W. 

 Cresswell). 



Fig. 4. — Hand of another specimen. From Two-Mile Beach, 

 Port Campbell. The original shows the ambulatory 

 legs. 



Fig. 5. — Wrist of another specimen showing spine. Two- 

 Mile Beach, Port Campbell. 

 (All outlines drawn under the camera lucida. The tigures 



are about natural size, except Fig. 5, which is enlarged about 



2^ diameter.) 



