364 CEASSATELLIXES. 



Crassatellites oblonga, Tenison-Woods (sp.). 



1876. Crassatella oblonga, Tenison-Woods, Pap. Eoy. Soc. Tas. 1875, p. 25, 



pi. ii. fig. 11. 

 1886. Crassatella ohlonga, Tate, Trans. Eoy. Soc. South Aust. vol. viii. 



p. 146. 

 1888. Crassatella ohlonga, Johnston, Geol. Tasmania, p. 234, pi. xxis. 



figs. 1-la. 

 1896. Crassatella ohlonga, Pritchard, Proo. Eoy. Soc. Vict. vol. viii. n.s. 



p. 131. 



Much more elongate posteriorly than C. dennanti, the concentric 

 lines of growth are prominent, but are not accompanied by pro- 

 nounced ridges, except in the umbonal region. The shells appear 

 to vary considerably in regard to tumidity, but all are very solid. 

 Mr. Gr. B. Pritchard remarks {op. supra cit.) that the Muddy 

 Creek forms are separable from those at the typical locality, Table 

 Cape, and he proposes to describe them as a new species. The 

 only specimen from the last-mentioned place in the Museum 

 collection is in such a bad state of preservation that the present 

 writer is unable to control the matter. 



Dimensions. — Height 47 mm. ; length 68 mm. 



Form, and Loo. — Eocene and Miocene : Table Cape and Yictoria. 



83999. Large fragment of right valve, much worn ; from Table 

 Cape. Purchased. 



L. 4834. Examples of the adult, both valves ; from Muddy 

 Creek. Presented hy John Lennant, Esq^. 



L. 6601. Specimens of both valves ; from Muddy Creek. 



Purchased. 



L. 9851. Specimens of the neanic and ephebic stages of growth ; 

 from Muddy Creek. Purchased. 



Crassatellites communis, Tate (sp.). 



1886. Crassatella astartiformis, Tate, Trans. Eoy. Soc. South Aust. vol. viii. 



p. 147, pi. xi. figs. 12-15 {nan Nyst.). 

 1893. Crassatella communis, Tate and Dennant, id. vol. xvii. pt. 1, p. 224. 



Shell small, subquadrate, margins not crenulated ; surface 

 ornamented by fine concentric folds. The change of nomenclature 



