18 DR. T. P. CARPENTER ON THE SHELLS OF PANAMA, 



277. Trochus lividus= Modulus disculus, M. 403. 



278. Trochus panamensis=Omphalius p. A good species, though 

 apparently very rare ; for I had the pleasure of adding it to the 

 Cumingian collection. 



2 79 . Troch us pellis-serpentis= Tegula p. 



280. Trochus reticulatusOmpJialius viridulus, M. 292. This 

 is the common Trochid of the Panama region, as is ligulatus of the 

 Alazatlan. 



281. Turbo buschiilhaniUa inermis, M. 287. This shell ap- 

 pears to replace U. olivacea in the southern fauna. Besides the dif- 

 ferences indicated in Maz. Cat. p. 229, the operculum is quite 

 distinct. 



282. ? Turbo phasianelIa=Collonia ph.: not (Melaraphe) pha- 

 sianella, Phil. 



283. Turbo rutilus. The unique type is in miserable condition, 

 to which the " hright red with pale streaks " is owing. The shell 

 may possiblv have been originally a Pomaulax undosus, which is 

 truly a Lower Californian species. It appears, however, to be a 

 favourite with sailors, as specimens are continually appearing, not 

 only high and low on the West Coast, but also from the Pacific 

 Islands. The specimens brought by Comm. Wilkes's U.S. Expl. Exp. 

 were obtained in N. S. Wales ! Prof. Adams's fragments were pro- 

 bably due to ballast. 



234. Turbo saxosits=CaUopoma snxnsum. This replaces the C. 

 fuctuosum of the Gulf, M. 282, and the C. tessellatum of Lower 

 California. The "var. depressum" of P. Z. S., 1855, I believe to 

 be really a Senectus from the Pacific Islands. 



285. Scalaria hexagona, C. B. Ad. : non Sbv., M. 564. The 

 Professor's shell is (I think) one of the species I described in P. Z S. 

 from Mr. Bridges' s collection ; but the distinctions in this genus are 

 too critical to decide without comparison of types. This shell is 

 broad ; whorls very separate ; varices long and sharp ; spirally 

 finely striated. 



286. Scalaria obtusa, C. B. Ad. ; ? non Shy. This also appeared 

 to me one of Mr. Bridges's species. It is a very pretty shell, with 

 close, sharp, coronated varices. 



287. Scalaria, sp. ind. a. Like the next, but larger, and with 

 spiral striae between the extremely crowded, sharp varices. 



288. Scalaria, sp. ind. b. Of the Clathratula type, without spiral 

 sculpture. 



289. Scalaria, sp. ind. c, is probably the young of Cirsotrema 

 funiculatum, M. 509, which, with its congeners, may be removed to 

 Opalia. 



290. Eulima iota. This shell, which is a Leiostraca (not " ? Sfy- 

 lifer"), is probably distinct from the Mazatlan form, M. 555, which 

 saould btand as L. retcxta. 



192 



