DR. P. P. CARPENTER ON HIE feHKLLS OF PANAMA. 27 



type. Ribs fine, tuberculous, cor.rse on the angular side. Ligaaicut 

 very narrow, truncated. 



427. Cardita ajffinis. (Lazaria.) 



428. Cardita latieostata^Venericardia I. 



429. Cardita radiata. (^Lazaria.) 



430. Cardium graniferum, M. 134. 



431. Cardium obocaie^Heinicardia o, 



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

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

 guluta. 



433. Cardium procerum, M. 12.5. 

 431. Cardium senticosum, M. 120. 



435. Venus lamathusia^ Anomalocardia snhimhricata, M. 113. 



436. Venus discors=Tapes fjratus. Say, ^l. 110. 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, ^1. 109. 



440. Venus subruffosa = Anomalocardia s., ^E. 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. l(iJ=V. sugillata, 

 Rve. C. I. no. 43. 



443. Ci/therea affinis. VTo\>aM\\-=CaUista concinna, var., M. 99. 



444. Cijtherea aurantiaca^= Callistu aurantia, M. 92. 



445. Cijtherea consanguinea-=CaUista c. Messrs. II. and A. 

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

 flated, almost colourless species. 



446. Cijtherea radiafa=.Trigona r., M. 83. 



447. Cijtherea squaUda=-Cal[ista chioneea, M. 93. 



448. Artemis dunkeri = J)nsiiila d., M. 90. 



449. Artemis sacettta=Cgclina subquadrata, M. 91. 



450. Gouldia pacijica, yi. 116. 



451. Cgrena maritima. Stet. The collection also contains two 

 tubes, containing a very young "ICydas" and another " Cyrenu, 

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



452. Lucina tellinoides= Fcfania t. Differs from F. sericata, 



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