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



303. Natica, sp. ind. c. The shell is marked/*, and is probably 

 = N. haneti 



304. Nerita $cabricosta=~Mi. 326. After examining a multitude 

 of specimens from different parts of the coast, I have not the slightest 

 doubt of the identity of the forms called ornata and deshayesii. 



305. Nerita, sp. ind. a=N. bernhardi, M. 327. 



306. Neritina guayaquilensis. Stet. + iV. intermedia, Sby. 



307. Neritina picta=WL. 329. 



308-316. Stent. The shells described as "Auricula " belong to 

 Melampus. 



317. Truncatella bairdiana. A good species. 



318. 11 Truncatella dubiosa. This belongs to Hydrobia or some 

 similar Rissoid. 



319. Bulla (Tornatina) infrequens=Tornatina i. t M. 222. 



320. Bulla (Cylichna) luticola=Cylichna /., M. 221. The Ma- 

 zatlan shell is much more constricted than most of Prof. Adams's 

 specimens. 



321. Bulla punctulata=B. adamsi, M. 224. The B. punctata, 

 A. Ad. = -B. punctu/ata, A. Ad., but is not the B. punctulata, 

 C. B. Ad.=. puncticulata, C. B. Ad., MS. on ticket. 



322. Bulla, sp. ind. = Tornatina cannata, M. 223. 



323. Vermetus 1 glomeratus, C. B. Ad. (not Bivonia glomerata, 

 Lam.)= V. eburneiiSy M. 354. The shells sometimes assume a ru- 

 fous tint in the later whorls, in which state (if the Turritelloid apex 

 be concealed) it is liable to be confounded with Aletes centiquadrus. 

 Some of the Professor's shells belong to the latter species. 



324. Vermetus panamensis, C. B. Ad. (? Rouss.)=^/ees centi- 

 quadruSy M. 352. 



325. Stomatella inflata is a Lamellaria with broken lip and very 

 much curved columella : v. M. 577. [A Sigaretus y with somewhat 

 sharper columella than the ordinary W. Indian form, was found 

 among the Professor's duplicate Panama shells ; but as it does not 

 occur either in the catalogue or the collection, it was probably dropped 

 in from the Jamaica series.] 



326. Hipponyx, sp. ind. Of the Professor's "two small speci- 

 mens " marked " subrufa, jun.," one is H. grayanus, jun., M. 350. 

 The other may be the same, but is probably the young of H. bar- 

 batus. Neither are sufficiently perfect to determine with confidence. 



327. Hipponyxlbarbata. Part of these specimens belong to H. 

 barbatus, M. 349 ; part to H. grayanus ; part are too much worn 

 to determine ; and one is a valve of Discina cumingii. 



328. Hipponyxpanamensis=H. antiquatus, M. 347. The species 

 is very widely diffused, and varies greatly in each locality. 



329. Hipponyx radiata-=H. grayanus, M. 350. The collection 



194 



