1863.] DR. P, p. CARPENTER ON THE SHELLS OF PANAMA. 365 



type. Ribs fine, tuberculous, coarse on the angular side. Ligament 

 very narrow, truncated. 



427. Cardita affinis. (Lazaria.) 



428. Cardita laticostaia=Fe7iericardia I. 



429. Cardita radiata. (^Lazaria.) 



430. Cardium graniferum, M. 134. 



431. Cardium obovale=Hemicardia o. 



432. Cardium planicostatum, C. B. Ad., not Sby. This looks like 

 a dead ballast- valve of Hemicardia media ; but it may be H. bian- 

 gulata. 



433. Cardium procerum, M. 125. 



434. Cardium senticosum, M. 126. 



435. Venus 1amathusia=^Anomalocardia subimbricata,'M.. 113. 



436. Venus discors=Tapes gratus,^ny,^. WO. The Professor's 

 specimens of this species and T. histrionicus are somewhat inter- 

 mixed. 



437. Venus gnidia, M. 101. Dead specimens; of which one may 

 possibly be Chione amathusia, M. 102. 



438. Venus multicostata. Closely resembling the West Indian 

 form. 



439. Venus pectunculoides=: Tapes histrionicus, M.. 109. 



440. Venus subrugosa=Anomalocardia s., M^. 112. 



441. Venus, sp. ind. a. A small species with concentric laminae, 

 armed with one posterior row of blunt spines. Interstices with mi- 

 nute concentric striae. 



442. Venus, sp. ind. b=: Chione crenifera, M. 105 = ^". sugillata, 

 Rve. C. I. no. 43. 



443. Cytherea affinis. Probably=(7a^Z^■«#a conctwMa, var., M. 99. 



444. Cytherea aurantiaca= Callista aurantia, M. 92. 



445. Cytherea consanguinea^ Callista c. Messrs. H. and A. 

 Adams have not made a subgenus to include this group of thin, in- 

 flated, almost colourless species. 



446. Cytherea radiata=-Trigona r., M. 83. 



447. Cytherea squalida^ Callista chioncea, M. 93. 



448. Artemis dunkeri= Dosinia d., M. 90. 



449. Artemis saccata=Cyclina subquadrata, M. 91. 



450. Gouldia pacifica, M. 116. 



45 1 . Cyrena maritima. Stet. The collection also contains two 

 tubes, containing a very young " 1 Cyclas " and another " Cyrena, 

 jun.," marked "Panama, C. B. Ad." 



452. Lucina fellinoides=Felania t. Differs from F. sericata. 



