I 



DR. p. p. CARPENTER ON THE SHELLS OF PANAMA. 27 



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

 very narrow, truncated. 



427. Cardita affinis. {Lazaria.) 



428. Cardita laticostata-=.Vencricardia I. 



429. Cardita radiata. (^Lazaria.) 



430. Cardium graniferum,M.. 134. 



431. Cardium ohovale=-Hemicardia o, 



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

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

 ffufata. 



433. Cardium procerum, M. 125. 



434. Cardium, senticosum, ^1. 126. 



435. Venus 1amathusia=:^ Anomalocardia subimhricata, M. 113. 



436. Fe?uis discors=Tapes ffratifs, Sny,^i. 110. The Professor's 

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

 mixed. 



437. Venus gnidia, M. 101. Dead specihiens ; 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 subruffosa = Anomalocardia s., ^1. 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 creni/era, M. 105 = F. suyillata, 

 Tive. C. I. no. 43. 



443. Cijtherea affinis. Probably =C«^/^«#a concinna, var., M. 99. 



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



445. Cytherea consangninea-=-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 squaHdu=-Callista chioncea, M. 93. 



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



449. Artemis saccata=:-Cyclina subquadratu, M. 91. 



450. Goiddia pacijica, INI. 116. 



451. 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 tellinoides= Fetania t. Differs from F. sericata, 



201 



