^i 



26 



DR. p. p. CARPENTER ON THE SHELLS OF PANAMA. 



d contains parts of six specimens, and perhaps should be a, no. 'iOO. 

 Thev appear to be a variety o^ Lifhojjliagns cinnamcnneus, M. 1/7, 

 but with broken shells, Sac, airglutiiiized on the posterior side. ^"(1) 

 contains four specimens of M. nm/fiforMis, the semigrcenish variety 

 (Maz. Cat. p. 119), and are probably intended fore. ./" (2) contains 

 two specimens of the same variety of M. multijurmis, in the burrow 

 of a Lithojjhayus, and may stand for d or e, 



40.5. Chama bnddiana=. C. (Jfrondnsa, \a.r.)/ornicatft, M. 121, b. 

 Additional specimens confirm me in regarding this species as distinct 

 from all varieties of frondosa. The Professor's shells not being very 

 characteristic, the diagnoses do not exactly accord. The shell stands 

 as C buddiana. 



406. Chama ? corrugata. The large valve appears a dead reversed 

 C. (frondosa) mexicana, M. 121, with the teeth perforated by Li- 

 thophacji. The other may be corruyata, very dead, of sienna-tint, 

 very pointed dorsally. 



407. Chama echinata. These appear to me to be the young, partly 

 of C. buddiana, but principally of C. mexicana. 



408. Nucula elenensis=-Leda e., M. 199. 



409. Nucula exigua, M. 198, 



410. Nucida polita=^Leda p. With semidiagonal lines. 



411. Pectunculus assimi/is+P. incequalis, M. 196. 



412. Pectunculus Imaculatus. Stet. 



413. Area alternata-=Barbatia a., M. 188. 



414. Ai-ca laviculoides appear* a young Scapharca, 



415. Area emarginata=^Seapharca e., M. 187. 



416. Area gradata-=Ba7-batia g.,^1. 194. 



417. Area grandis, M, 180. 



418. Area mutabilis=-Byssoarca m., M. 190. 



419. Area {Byssoarca) pholadiformis. This is simjdy an elon- 

 gated form of Barbatia gradata, probably from growing in the hole 

 of a Lithophagus. The umbos are '* flattened " by erosion ; teeth 

 not "obsolete" under the glass; "ligament concealed" simply by 

 the compressed and elongated growth. 



420. Area reeviana = Barbatia r. 



421. Area reversa^=Noetia v., M. 185. 



422. Area similis. This is scarcely a variety of A. tuhercidosa, 

 TVL 184. The specimens are dead and oiled, with most of the epi- 

 dermis abraded. 



423. Area solida = Barbatia s., M. 195. 



424. Area {Byssoarca) tobagensis=^ Barbatia illota, M. 193. 



425. Area tuberculosa^ M. 184. 



42G. Area, sp. ind. a. These little shells approach the Noffta 



200 



