- 138 - 



later stated, vrith Sowerby's brief desGription (l), but when he 



(1). ^oc. cit., p. 258, 1875. 



prepared the Santo Dominp-o memoir he recognized the identity of 

 his £. yeatchii ft^pe localit37, 3erros IslancI, off lo'.ver Califor- 

 nia and oconrring also at San Bruno on the east .side of the Penin- 

 sula of Lower Oalifornia) and 0. haitensis . The California form, 

 apparently is comparable in size and in other features to the larpe 

 ?loridian and Santo Dorainp-ian specimens. Ball has added to the 

 synonymy t'-p ^ir^^i^ured 0. h eerraarjii -^onrad and 0. ves oertina Conrad, 

 both originally describee! from "Carrizo Creek", California. Accor'i- 

 ing to the excellent figures in the ITe-ican Boundary Report, the 

 plications of ves -^ertina are not as high or as sharp as on the typi- 

 cal haitensi£ and the out] ine is not as rounded, but these feati^res 

 are probably due to inmaturity. It ap-oears that the California 

 paleontologists still consider vesnertina , veatohii and heernanni 

 distinct species, 



Guppy (1866) stated that he could not consider 0. haite nsis 

 distinct from 0. virginica Gmelin, but later (137G) he recognized 

 the fact that they are sharply differentiated, '-^oula's " Ostrea aff. 

 yespertina Conr." 1D09, Cratun, Panama, a^mears to be the young of 

 haiteticio ; his ICll citation ( Tehu8nter)ec , l.e^ico) refers to two 

 sr.all, rather elongate right valves, with strong concentric mark- 



