DR. P. P. CARPENTER ON TIIR )>HELLS OF PANAMA. C3 



son"*" <»»• iindduljtfdly ('. tiirca ; otliers truly C. viijjiii/oriniH ; niid 

 otldTS probalily ('. nirea, but witli tlie riblcts woru away by tlie 

 crabs. 



S.*)!. Crepidtila nivea, 31.311. Tlie specimens are small Jiii I 

 poor; mostly rougli, of the aru'ty .sfrio/a fa passiuj; into Icssimii, 

 ^Vlu•r(>vc^ tbe ape\ is pcrtVct, it pic^t'iits tlie cliaiacteristie ribUts, 

 but is ^n-uernliy white, not brown as in most of the tiucly grown 

 Mazatlan shills. 



i;"*2. i'ri'pidvla osrulans. Tin-* is a pc^ect and extremely Ix'fin- 

 tifnl specimen of Scutellinn nnrici'lloi'lfs, M. 'liW). The I'mt •»or 

 did not observe the non-spiral patelloid apex, and re^anled the 

 " navicelloid " columellaas an extremely narrow deck. To tbe diag- 

 nosis in the Maz. Cat. nuiy now be added " apice ohtusu, suhlicci ; 

 vertice haud spirqli, vix conspicuo." 



.S53. Crepidula rostrafn=C. ndiuira, ^l. 33S, ?iion Sby. The 

 examination of a large series of specimens from the teinj)erate fauna 

 has led me unexpectedly to confiim Mr. Heeve's opinion tiiat they 

 are distinct. The northern shell is C (ii/imcu, Sby. (^(tar/iofiu 

 [Gray] solida, IIds.:=C ros/rijoniiis, Gld.) ; and t. tropical ?!iell 

 must take the prior name, C. unvutu, Mkc. ( = C. rustratu, (J. li. Ad., 

 Rve. = C aduncu, Maz. Cat., non Shy.). 



354. Fissurella (equalis= Fissure/lidtea te. 



355. Fissurella alta^Gbiphis alta, M. 280. 



356. Fissurella macrotrema. Stet. 



357. Fissurella microtremu. These are dead specimens, of which 

 some are F. ruyosa, var., M . 273. 



358. Fissurella nms=^GIi/phis incequnlis, var., ]M. 2/9. These 

 shells are intermediate between tbe typical form and /Jtca. 



359. 360. Stent. 



361. Fissurella virescens. It is doubtful whether any of the spe- 

 cimens are of the true virescens, IVl. 271, as they run into niijro- 

 punctata by insensible gradations. I'ei baps both species may pio^e 

 identical. 



362. Siphonaria characterisfica = S. yiyas, var. 



363. 364, 365. Stent. 



366. Siphonaria 1 pica. These are young dead limpets (not 

 Siphonarice). 



3C7. Lottia 1 patina, C. B. Ad. (non Esch.). These shells differ 

 from Acmcea mesoleuca, M. 263, iu being black instead of greeu, and 

 are prettily striped. 



368, 369, 370. Lottia, sp. ind. There may be two or even more 

 species of Acmaea, but it is not impossible that there is only one 

 among the professor's Lottise, some of the specimens being tie 

 young of ? I'atella, no. 371. ,q« 



