DR. p. p. CARPENTER ON THE SHELLS OF PANAMA. 19 



291. EuHma recta. The type .is a very good species of Leva<- 

 straca ; but I doubt its identity with the Cumingiai^ specimen, with 

 which the JMazatlan shell, M. 550, was compared. It most resembles 

 the L. linearis, M. 554, with which it agrees in divergence and 

 general shape ; but that is very much smaller, with the upper whorls 

 more tumid. In the Professor's type of L. recta, I searched in vain 

 for traces of the " two brown spots." They were probably thrown 

 by defective light. The " two opaque spiral bands " are simply the 

 eifect of the suture, and the previous whorl showing through. For 

 the Mazatlan shell, M. 550, I propose the name of L. involuta. 



292. Eulima solitaria. This also is a Leiostraca, not " ? Sty- 

 lifer," and accords exactly with the Leiostraca, sp. ind. a, M. 552, 

 hut not with the supposed L. solitaria, M. 551. The latter agrees 

 in shape with the unique Panama shell, whorl for whorl ; but its 

 base and labrum are much more produced anteriorly. For this rea- 

 son, it may be known as L. producta. 



293. Pyramidella, sp. ind. This is probably the Obeliscus de- 

 scribed in Maz. Cat. no. 486. 



294. Pyramidella conica =: Obeliscus conicus, C. B. Ad., not 

 M. 486. 



295. Natica che)nnitzii:=N. maroccana, M. 570. The Professor 

 first labelled these shells " N. ? maroccana, Chem.," but crossed it off 

 in pencil. Another tray appeared (without number) labelled "luni- 

 fasciata. Lam." They all belong to the large West Coast form nf 

 maroccana. [N.B. The shells described in P. Z. S. as " var. cali- 

 fornica," on the authority of the late Mr.' Nuttall, are (with others 

 from the same source) undoubtedly from the ISandwich Islands. 

 The Pacific specimens (of which I have examined many thousands, 

 brought by Comm. Wilkes's E. E.) present a very different type from 

 those of the west coasts of Africa and America ; but are regarded 

 by Mr. Cuming as only a local variety.] 



296. Natica 1 lurida. These shells are simply a pale variety of 

 N. maroccana. 



297. Natica otis, C. B. Ad. (not Brod. & Sby.). These shells 

 appear to be the young oi Polinices " salangonensis," P. 298. 



298. Natica 1 salangonensis. I had no opportunity of comparing 

 this Polinices with the species of Recluz. 



299. Natica souleyetiana. The shells closely resemble N. ma- 

 roccana, but with a larger umbilicus. 



300. Natica Ivirginea, C.B. Ad. (not R^cl.) = Polinices uber, 

 M. 576. 



301. Natica, sp. ind. a. There is no ticket answering to this 

 number, which was probably intended for the V. maroccana, var. 

 " unifasciata." 



302. Natica, sp. ind. b. The shells are marked e, and are the 

 j-oung ni Polinices uber, P. 300, M. 576. 



13 193 



