DR. P. V. CAKITNTrU ON THE i>HELLS OF PANAMA. » 



1-13. Ml/rex vilirx. Tliis Peruvian species also probably belongs 

 to the Piir|iiin(l group. 



141. Mil rex vittafiix=:Muricn/ea v. 



l-ir>. ( = M. fuiH), I J(i ( = .M. 57')). Stent. 



1-1". FiisiiM hi'llii.s, C. B. .\d. Tliis is a pretty little sliell, rcsem- 

 blini; a yoiinir Mffuhi, and is prol)al)ly one of tlie species assigned 

 witii doubt to that genus, M. (il!)-()'J2, orto Fiisus, M. (i 12. I should 

 erase tiie words, "some of whieh are varicoid" (referring to tiu' ra- 

 diating ril)s}, as my glass did not enable ine to deteet a single one. 



1-lS. Fiisciolaria j/innnsn. A minute specimen is of the size and 

 general appearance of the fry of C/iri/so/omus antiquiis, with one and 

 a half irregular nuclear whorls. An adult has its operculum broken 

 and mended tVoiu a snlieentral nucleus — a mode of proceeding whicli 

 I liave now observed in such a multitude of sjiecies belonging to dif- 

 ferent families of i'mboscidifers and Toxifers that I vt-nture to assign 

 it as the original type of their opercnla, from which the .special 

 iamily lorms are moditicatious of high develo])ment. Of the spiral 

 Rostrifers there is not yet sutlieient evidence to speak*. 



149. TurLiHella cffstiis, "S\. 581. 



l.")0. Tiirbinella cnsfartea = Latirus c. ■ 



lal. Turblnella cerata=^ Latirus c, M. 5S2. 



\'yl. Tiirljiiiellii riidis=^ Latirus r. 



153. Turfjine/la spaf/icea= Latirus s. 



l.o4. Caiicellaria affinis. Very closelv allied to C. urcpolata, 

 M. 445. 



155, 15(i, 157( = :\r. 44fi), 158, 159. Stent. 



160. Cancellaria liyijmcRa is simply a young specimen of C. f<;- 

 niostoma, no. 157. 



161, Wl. Stent. 



163. Plevrotoma aterrima^Dri'fin a. 



164. PU'urotoma atrior. This is a fine specimen, not quite ma- 

 ture in the lip, of Drillia aterrima, var. melchersi, M. 461. 



165. Pleurotoma bicanalifcra^^Clathurella h. 



166. Pleurutoina conaris=Drif[ia u. 



167. Pleurotoma concinna=Cithara c. 



168. Pleurotoma corruffata= Drillia c. 



169. Pleurotoma discors= Drillia d. Probably a finely developed 

 variety of aterrima. 



* When at Charleston, S C, I had an opportunity of examining many very fine 

 specimens of tlie giant Fasciolarw, so seldom seen in this country, of wliich a 

 hroken apecimen in my collection measures 20 in. In sculpture, colour, and 

 general appearance some were so very like F. princeps, M. 584, that I wis tempted 

 to consider the latter a degraded ,ocal vaneiv, till £ lannd the opeicuium, ,vhicli 

 ig detititute oi' the singular grouviiis of the Gulf species. 



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