?'? iiK. r. V. cxnvvsirxi on vuv siui.i.s of tanama. 



M. 152, in haviiii: a vollow, not silky, epidermis. The spei'irnens 

 vary oonsiilerablv iu thiekness. The sjenus soareelv ditlVrs from 

 Mi'itha. 



453. Caj)sa altior=Jphitjenia a., ^I. 01'. 



454. Voiuhv assimiliif, M. 74. 



455. Donaie ffraciliist. Stet. 



456. Donaw naricula, M. 77. 



457. Donax rastratus. This single valve proves to be the trne 

 Ih carinatus, M. 71, and not the shell whieh 1 called V. culmiiiatust 

 M. 72 (=^cannatiis, var., Hani, in Miis. Cnni.). which I snbse- 

 nnently atHHated to the supposed roatrattis, Maz. Cat. p. 54S, on the 

 authority ot' Dr. Gould's specimen. ^Ve were prohahly both misled 

 bv the '• jv/v/ sharp angle," which (as compared with the other form) 

 1 should call rounded, and the "' concave" surface, which I should 

 translate into tlat. The names have been altered in the t'liniingiHU 

 collection since the Mazatlan shells were identitied ; but Mr. Hanlty 

 ioforms me tliat thev are now correct ; that the V. culminattis, M. 

 72, is his own original carinatus ■, and that the D. carinahts, M. 71 

 (olim Mus. Cnm.)> which is certainly /). ro^ntratus, P. 457, must 

 ttand under Prof. Adams's name. 



45S. Teliina aurora. Stet. 



459. Tellitta cot/nafa, C. 1>. A.d.=^Psanimobia casta, l\ve., tesfe 

 ruming. The sculpture consists of semidiagonal stritxj passing over 

 the lines of growth. In other sptvimens examined from Panama 

 t lese are sometimes crowded, sometimes distant, occasionally flex- 

 iious, sometimes almost evanescent. 



4oO. Teliina columbiensis. (Pero)uea.) 



-\6\. Teliina eonciitHa^Jifaeoma c. The " slight tinge of pink" 

 1 could not discover. 



4t>2. Teliina cri/stallina=:Tellidora c. 



463. Teliina cuminffii, M. 55. 



464. Teliina domljeyi^= ^acoina </., M. 50. 

 4t)5. 2>!linafeli.i\ M. 51. (Jni/nlus.) 



466. Teliina laeeridens. (^Peron(eodenna.) 



467. Teliina prora. (^Peronfeoderma.) 



465. Teliina puella. Not unlike T./elix, and distinct iVom M. 5i). 



469. Teliina rubescens. {Per(>n(eodentia.) 



470. Teliina siliqua. The two odd valves belong i^robably to a 

 MiH'otna, in shape resembling Thracia p/iasevlina. 



471. Teliina simvlans^^T. {Peronfeodermj) punieea, M. 54. The 



species was described, for geographical reasons, from a young, pale, 

 and undeveloped valve. On comjnuing it with the Professors owu 

 "West Indiroi s^.eeiuieus, 1 could detect no difieieuce. 



202 



