156 Bulletin 35 304 



Ostrea percrassa. — Conrad. 

 Tertiary Fossils. Page 50, PI, xxv, F. 1. 



Our specimens are thick and heavy, but they agree with 

 Conrad's Figure. The name is appropriate. It may possibly be 

 the same as Ostrea tryonii Gab. (Miocene Fossils 1878, P. 348 

 PI. xlv, F. 27). The other two Forms of Oyster found in the 



Page 14 



Westiudian Miocene, 0. haitensis and O. virginica, do not appear 

 in this collection. 



Cardium compressu??i Dall. 

 Flor. Foss. Pt. v, P. 1109, PI. xlviii, F. 21. 

 Area consobrina. — SowERBY. 

 Journ. Geol. Soc. 1850, PI. x, F. 12. 

 Dall prefers the name of halidonata (Flor. Fos. Part iii, 

 Page 646) and he rejects Gabb's identification with^i. floridana. 

 Like most arks the shell is variable but I am satisfied that our 

 shell is the one intended bySowerbyin his Figure. Dall's figure 

 in my opinion does not represent Sowerby's consobrina, which is 

 more like his actinophora in shape, though the proportions are 

 not exactly the same. 



Ra?iina cuspidata. — Guppy. 

 This crustacean from the Tamana beds was described and 

 figured by me in -the Bulletin of the Agricultural department, 

 1909. 



Balanus porcatus. — Darwin . 

 Barnacles probably of this species are not uncommon in the 

 miocene deposits and there is a bed composed chiefly of them at 

 the Government farm in Tobago. A few specimens are in the 

 collection from Springvale. 



Brisus exiguus. — CoTTEAU. 



Kchinides tertiaires de S. Barts, &c, p. 35. Pi. vi, F. 16-18. 



The examples are large, but are only casts. The species 

 was recorded by me in 1866 from Anguilla under the name of 

 B. dimidiatus from which it differs slightly. 



