1 82 CHLOROSTOMA. 



This seems to be a form perfectly distinct from the Californian 

 shells called fuscescens by Cpr. and other .American authors and 

 collectors. See C. Ugnlatmn. 



C. SMiTHii Tapparone-Canefri. PI. 24, figs. 100, 101. 



Shell globose-conoidal, thick, rather smooth, obscurely transversely 

 striate-lirate, the lirse more evident on the base; whorls 62 , terete; 

 the penultimate inflated, convex, the last rotund, subcarinated ; base 

 somewhat convex; aperture suborbicular, lip much thickened within ; 

 subdenticulate within ; columella sinuate, white, continued above in 

 a lobe partly surrounding the umbilicus, and at the base bearing 

 three obvious tubercles ; throat smooth, silvery; shell green, flam- 

 raulate with white ; base around the umbilicus pale, purple flam- 

 mulate. Alt. 27, diani. 26 mill. (Tap.-Caii.) 



Peru. 



Omphalias smithii Tap.-Can. Viaggio della R. Fregata ' Magenta ' 

 (Malacologia) p. 62, t. 1, f. 18. 



This species is allied to O. viridulus Gmel., but is distinguished 

 by (1) its larger dimensions ; (2) its almost smooth surface, the 

 cinguli almost obliterated ; (3) the three very pronounced tubercles 

 at base of columella ; (4) the smooth and thick lip ; (5) the convex 

 base, the angle scarcely noticeable ; (6) the umbilicus is less covered 

 by a more extended callous. (Tap.-Can.) 



C. PANAMENSis Philippi. PL 61, flgs. 11, 12. 



Shell globose-conoidal, umbilicate, solid, transversely sidcate, pur- 

 plish, marbled with white spots ; whorls convex, the last rounded ; 

 transverse sulci about 10 on penultimate, 24 on the last whorl ; um- 

 bilicus narrow ; aperture circular ; columella produced above in a 

 lobe partly surrounding the umbilicus, below terminating in three 

 denticles ; lip very smooth within, with a basal sulcus parallel to the 

 margin. (Phil.) 



The shell is thick, globose, conoidal. The 5 to 6 whorls are 

 separated by a deep suture, the upper ones slightly, the penult, and 

 last strongly convex. The circumference is indistinctly angled ; 

 the base rather convex ; the whole upper surface is densely furrowed 

 by blunt tranverse sulci, of which I count 10 on the penult., al)out 

 24 on the last whorl, including the base. The umbilicus is rather 

 narrow, nearly cylindrical, encircled by a carina, above which a 

 more prominent spiral rib revolves, which ends at the columella in 

 three denticles. Tiie aperture is very oblique, circular ; the outer 



