from Sta. Barbara, California. S 



account of them, except that they contirm the foregoing state- 

 ments in their general character. 



The following are diagnoses of the new species in Col. Jewett's 

 collection. 



Turritella Jewettii. 



T. testa satis tereti, hand tenui, cinerea riifo-fusco tincta ; anfr. 

 subplanatis, suturis distinctis ; lirulis distantibus (([iiarum t. jun. 

 diise extantiores) et striolis subohsoletis spiralibus ciucta; basi 

 parum angulata ; apertura subquadrata ; labro teuui, modice si- 

 nuate. 



Hab. Sta. Barbara, Pleistocene formation [Jeivett). San Diego, 

 on beach {Cassidij). 



This species conies nearest to T. sanguinea, Rve., from the 

 Gulf, but differs in the faintness of the sculpture. Mr. Cassidy's 

 specimens may be washed fossils, or very poor recent shells. 



Bittium ?asperum. 



B. testa B. quadrifluto forma, maguitudine, et indole simili, sed 

 sculptura intensiore ; eodem vertice nucleoso abnonnali ; sed, vice 

 filorum, costulis spiralibus costas spirales superantibus, subuodu- 

 losis ; t. jun. costulis ii. anticis majoribus, alteris minimis ; postea 

 plerumque iv. subsequalibus, interdum iii. interdum aliis inter- 

 calantibus ; sculptura basali intensiore ; costis radiaiitibus sub- 

 arcuatis. 



? = Turbonilla aspera, Gabb, in Proc. Acad. Nat. Sc. Phila- 

 delphia, 1861, p. 368. 



Hab. Sta. Barbara, fossil in Pleistocene beds; abundant (/ewi?/^). 

 S. Pedro, S. Diego, Catalina Is. 30-40 fms. {Cooper), State Col. 

 no. 591 c. 



Mr. Gabb informs me that his Turbonilla aspera is a Bittium. 

 Unfortunately the type is not accessible; and as the diagnosis 

 would fit several closely allied species, it cannot be said with 

 precision to which it rightfully applies. As this is the com- 

 monest of the group, it is presumed that it is the " Turbonilla" 

 intended. Should the type, however, be recovered, and prove 

 distinct, this shell should take the name of B. rugatum, under 

 which I wrote the diagnosis, and which was unfortunately 

 printed in the Brit. Assoc. Report, p. 539. The fossil specimens 

 are in much better condition than the recent shells as yet dis- 

 covered. 



Bittium armillatum. 



B. testa B. aspera simili ; anfr. nucl. ii. laevibus, tumentibus, vertice 



declivi, celato ; dein anfr. ix. normalibus planatis, suturis iinpressis ; 



t. adolescente seriebus nodulorum tribus spiralibus extantibus, 



supra costas instructis; costis radiauiibus circ. xiii. fere parallelis, 

 ooo 



