DR. P. P. CARPENTER ON THE SHELLS OF PANAMA. 21 



also contains a tray labelled " Panama : C. B. Ad. don.," in whicli 

 are Hipponyx serrafus, M. 3-16, //. bnrLaf.vs, and Gtu/i/n'a jientac/' - 

 niostotna, M. 270. This last name should he dropped, except as a 

 variety of G. stellata, Shy., which is the normal state : v. B. A. Hep. 

 1857, pi. 7. f. 3, a-g. 



330. Calypfrcea aherrans. The Professor candidly allows that 

 "in texture this shell much resembles a valve of an Anomia,''' whicli 

 it undoubtedly is, the supposed "probably imperfect cup" being 

 the ligamental pit. The large muscular scar is very clearly de- 

 veloped ; but the others are faint, as is customary in young shells, 

 and might stand for either Anomia or Placunanomia. The valve is 

 thin and glossy inside. The outside is smooth, excepting the lines 

 of growth, and is encrusted with beautiful zoophytes. A tiny Ser- 

 pula, which has coiled itself close to the umbo, carries out the idea 

 of a Calyptraeid spiral apex ; but a careful microscopic examination 

 displayed the true Anomoid nucleus, at a little distance from the 

 margin, as is common in the Mazatlan specimens of A. lampe, 

 M. 219. 



331. Calyptrcea (Syphopatella) aspersa-=Clalerns conicus, very 

 worn and young, with the lamina broken away. One of the speci- 

 mens may perhaps be mamillaris. 



332. Calyptrcea cepacea=M.. 345. 



333. Calyptrcea conica. These are dead specimens, of which a 

 few may be the true Galerus conicus, M. 332. But most of them 

 belong to the brown-tinted variety of (the Professor's G. i-e(/ulariis=^) 

 mamillaris : v. no. 340. 



334. Calyptrcea dentata= Crucihulmn imbricatum, M. 343. 



335. Calyptreea hispida=^Crucibulum sjjinosum, M. 344. 



336. Calyptrcea imbricata. The two specimens are too much 

 worn to affiliate with confidence, the cups being broken out. The 

 outside is ribbed, with arrow-headed strife between the ribs-. They 

 probably = Crucibulum i., var. 



337. Calyptrcea maculata= Crucibulum spinosum, M. 344. See 

 the attempt to unravel the confusion in the synonymy of this family 

 in Maz. Cat. pp. 264-29.T. Three specimens marked by the Pro- 

 fessor " C. maculata, var.," are young, dead radiata, no. 339. 



338. Calyptrcea planulata. This unique shell is simply a young, 

 flat C. cepacea, with the cup prominent, and the outside sculpture 

 faintly developed, from living in a hollow place. The striae are not 

 "obsolete around the apex." 



339. Calyptrcea radiata=i Crucibulum r. This rare and beautiful 

 species is quite distinct, even in the early stages, from all varieties 

 of C. spinosum. 



340. Calyptrcea {Syphopatella) regularise:. Galerus mamillaris, 

 M. 333. 



341. Calyptrcea umbrella^=Crucibulu?n u. (=C. rudis, Bred.). 



195 



