T)R. P. P. CARPFNTER ON THE SHELLS OF PANAMA. -J 



have hollow lunbos. One lonr; shell, fir»t iimikecl f, hut al'cn li to 7, 

 is the adult toriii ; several of the yoiiiii;er siielU are iluuljt.ul. 



HS4. (htrea, sp.ind. e. = ()/ifrea, >[,'il.i. Being h good sppcies, 

 I propose the name of O. amura. The ]'rofes>or's " small var." is 

 not plieatfd, and ni)|iears to helong to O. rDurhfiphiht, M. '1\A. 

 [N.B. Additional speeiniens coiiHrm me \n tiie belief that O. pal- 

 mulot M. 214 h, is a distinct species.] 



aHJ. Spondijlun lumurckii, C. B. Ad. = 5. calclfer, M, 20H. 



386. Spondijlus, sp. ind. a = Plivatula penicillata, M. 210. 



387. Pecten inca = P. ventricosus, Sby., as in errata. 



388. Pecten tumbezeniiis = P. aspersus, Sby., Ilanl. (? Lam.). 



381). Lima anyvluta. Shells inflated, not gaping. 



390. Lima pacijica (=L. urcuata, Sby., Ilanl.). Young shells, 

 species uncertain. 



3!M. Aviculu liiinrgaritifi'rn^Mnryarlfiphnrn fmhriata, Dkr., 

 M. 204 = , v. maziilluuica, Hanl.=Ji. baihata, live. 



392. Avicula sterna, INI. 203. A. lihella, Rve,, appears to me 

 the young of this s|)ecies. 



393. Perna, sp. ind. a = Isoffnomon chemnitziana, M. 20.). 



394. Perna, sp. ind. i = /. chemnitziana, var. Rather more 

 finely grown, and with less colour, but certainly the same species. 

 The Professor's Jamaica specimens are labelled " bicolor, Ad." 



39.i. Pinna maura, M. 200. 



396. Pnna tuberculosa. Three of the specimens appear to me 

 = f . hiuura, jun. The other may be the same, but is worn nearly 

 smooth. 



397. Mytilus, sp. ind. a. Resembles the young of Modiola bra- 

 sinensis, but with a few hinge-teeth, as in 3/. edulis. 



398. Lithodumus, sp. ind. a. Most of these specimens are of 

 Lithophuyns uristatus, M. 176 ; one (perha|)s two) are L, attenua- 

 tus, M. 173 (which is found from Lower California to Chili) ; and 

 one appears to be L. plumula, M. 1 75 ; but they are too young to 

 decide with confidence. 



399. Modiola 1 semifusca. These specimens all helong to the M. 

 brasiliensis, M. 171, but are much more like the ordinary Brazilian 

 specimens than are those from Mazatlan. As compared with the 

 latter, the Panama shells are more rounded, with stronger posterior 

 grooving, and with the angular ridge less marked. A i.imiiar shell, 

 undoubtedly from New Zealand, is considered by Mr. Cumiug con- 

 specitic. 



400-404. Modiola, sp. ind. a, b, c, d, e, I could find no a or * 

 in the collection; but there were two trays marked y. Tray 6 = J/. 

 ci/pax, M. 170. c contains several specimens of Mi/ fihis mulli/ormis, 

 "M. 108, strongly ribbed variety, perhaps intended lor b, no. 401. 



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