DIl. I*. I*. CArtlT.NTKri ON TIIK HIIKM.S (iV I'ANAMA. '2'J 



472. TeUina Hincera-=i SlriifUla h. 



47'i- TcHina vl.cirM^=IIett'roilon'i.x vudnu.H. Tin; hIi'-IU anj li'i- 

 hcllcd T. vc.rxic.itlor l>y tlit; I'roff.v-isfjr. 'I'licy are larger ifiaii tin- go 

 iicrai run ot" West IiirJiaii H()(;cirri(;rH ; but tlio I'or/n is |jrol>.iljly a 

 local variety of tlie old lli'.lc.roddaax lji.rnui:iil,af,uH. 



474. TeM'ma, sp. irifJ. a. 'i'hc doubt concortiiiij; "concave" and 

 *' convex" probably ariscH from an error in deacri[)tion. 



47.0. Tcllinn, 8p. iiid. fj. Looks exactly like tlieyounj^of No. 4 71, 

 hut with lateral teeth. 



47^*. T<dliii,a, sp. ind. r;. Dia'J valves of" T./ctix, No. 4fj.>. 



477. I'tttricolo, r.ofjnata. More characteristic Hpecirneus from the 

 Harne eoa'-t are affiliated bv .Mr. i'AUiwu'^ to /'. fi/iol'idiJhrnii.H, I'roiri 

 which this would [irobaljly not have been Hej)arat(:d had it apjjeared 

 on the Atlantic coast. 



4/8. Snxicana '.temuH. The Panama shell is aiore like I'etrirola 

 than Saxicava, having two teeth in each valvi;, one of which is bifid. 

 Sowerby's species is called by .Messrs. II. & A. Adarn« " Sucicava 

 tctuiiH' (ii. [). :'y\[)) and " I'et/ricolu tenuifi" (ii. p. 4 1 1 ). Shell with 

 very fine radiating striw;, crossed by irr(;gular stria; of growtli. 



479. Curninffia coarctata=C. tameUoHa, var., JVI. 42. 



480. Cumingia triyonulariH, M. 4.'i. 



481. Cuminyia, sp. ind. a = C. trujonularin, No. 480. 



482. Cumirujiu, sp. ind. b^C. var. coarctata. No, 479. 



48.'i. Cumirifpu, sp. ind. c=M. Ait. This appears a distinct spe- 

 cies, and may be quoted as C. at/amnii, in remembrance of the labours 

 of .Messrs. If., A. and C. Ii. Adams. 



484. Cvminrjia, sp. ind. </= Maz. Cat. tablet 107, p. '51 ; well 

 rounded, witli close striae. Probably distinct. 



48.0. Amphidesma hicolor=-Sfrmde Voenunfa, M. 41 (uuu A. Ad.). 

 The "species" in this genus are often separated by vary variable 

 characters. 



486. Amphide/ima lellipticum^^Semele e. 



487. AmphidfiHrna proxirnum. The type is not quite so elliptical 

 as the last species ; but as this is a very variable character (v. .Maz. 

 Cat. p. 2S), I should rc/^Hrd it as the same. It is not the Srvnele 

 proxima, M. 40 ( = S. Jlaueicfuuf, v. .Maz. Cat. p. j]H). 



488. Amphidesma pulchrum=^ Semele p. 



489. Arnphidexmn gtriosum.=^ Semele a. I should describe the 

 shell as smooth, with very fine diaj^onal strife crossin;^ the lines of 

 growth. It has the general aspect oi' S. pulc/ira. The teeth in one 

 valve are long and sharp. 



490. AmphideHma torluoHv.m=^ Hemele t. Teeth short and faint. 



491. AmphideHma vcntrico>fum^=S(;mf:lr; V. The " zones " are r cry 



203 



