1888.] 137 [Meyer 
Venericardia granulata Say. 
Venericardia tridentata Conr. 
Astarte vicina Say. 
Astarte undulata Say. 
Crassatella undulata Say. 
Gouldia lunulata Conr. 
Chama congregata Conr. 
Kellia levis H. C. Lea sp. 
Erycinella ovalis Conr. 
Lepton mactroides Conr. 
Diplodonta acclinis Conr. 
| Lucina crenulata Conr. 
(= Lucina Leana d’Orb.) 
(= Lucina lens H. C. Lea.) 
Venus cortinaria Rogers. 
Circe metastria Conr. 
Tellina lusoria Say. 
Tellina producta Conr. 
Semele subovata Say sp. 
Saxicava arctica Linné, var. bicristata Conr.* 
Mactra modicella Conr. 
Corbula cuneata Say. 
(= Corbula ineequalis Say.) 
Glossophora. 
Dentalium attenuatum Say. 
| Cadulus thallus Conr. sp. 
| Chiton transenna H. C. Lea. 
Fissurella catilliformis Rogers. 
: Adeorbis concava H. C. Lea sp. 
hi (= Delphinula lipara H. C. Lea.) 
i" Teinostoma subconica H. C, Lea sp. 
: Delphinula costulata H. C. Lea. 
Trochus torquatus H. C. Lea. : 
(= Trochus Ruffini H. C. Lea.) é 
Trochus lens H. C. Lea. 
(= Delphinula trochiformis H. C. Lea.) 
Natica spherulus H. C. Lea var. 
Crucibulum grande Say. 
(= Infundibulum concentricum H. C. Lea.) 
Crepidula fornicata Lam.t+ 
# See Proc. Acad. Nat. Sci. Phila., 1884, p. 108. 
q + Most of the species of Crepidula, described from the Atlantic Miocene, if not all of 
> them, are apparently synonyms of this form. It is very variable and specimens of dif- 
ferent age, shape and ornamentation have received specific names. 
PROC. AMER. PHILOS. SOC, xxv. 127. R. PRINTED MAY 10, 1888. 
