?18 Pmavm tShlk- cALTPT8-s;iP-JB, 



Janama; Q, B, At I 

 X2 ^peciwena Vfpr^, poll^Qitecl, 



S28. Ilippoiiyx Panamensis. 



Hipponyx mitrula Sowb. (non Lam.) in Proc. Zool. Soc. Lond. 



p. 5. - - ' - ' ' J»P, 1835. 

 Sowb. (non Lam.) Thes. in Conch, p. 369. No. 



2. pi. 73. f. 18-20. - - - 1846. 



We propose this name for a shell, which Mr. Sowerby seems 

 to have confounded with H. mitrula Lam. The Lamarekian 

 shell is the Caribbean gpcQi^g, whicb, has a cu^rved apex that is 

 sometimes much elongated, " apice adunco " Lam. The Panama 

 shell is obliquely conic, with the> ape?: paoderately prominent. 

 The Qpncentrio lamina^ are more numerous and the r^dig,ting 

 stfise on them ar^ more deeply impressed than in the Caribbean 

 di^ll. This spepies is thick an(i solid, 



Length .67 inch ; breadth .7 inch ; height .87 inch. 



A (Jead §p^cin;ien of Cardita affi'^is ha^ on one yalye 4 rather 

 small individuals. The attached valves are rather thin, and have 

 been more or legS; peufbrated, fro© withja th.Q Oardita, by some 

 boring animal. Around the perforations there is a thicker 

 deposit, which fills up sorne of theiR. 



Station. — On stonCs in 17 fathoms water, among coarse sand^ 

 Cuming 1 Sowerby. Our specimens were found on stones and 

 shells near low water mark-. 



.^a6%t-=rLpbos I, J Oupiing I, SoAyejrby, 



Panama.; 0. B,,A^I, 

 14 specimens were collected. 



§20. nwpQnyi;. r»ai«ita, 



Synpnyniy.. 

 ¥wP<myx V9<imtq, Sowb. in f roc. Zppl. goQ. Lon.cl, p. §. Jan. 1835. 

 Sowb.TLe3.Conoli.p,870.Np.4.pl,73.f.24,25. 1846. 



