188 CHLOEOSTOMA. 



divided by a sulcus, and broader than the interstices. The last 

 whorl has 15-16 such lira?, and is almost cylindrical. The umbilicus 

 is pretty narrow, almost cylindrical, bounded by a prominent sharp 

 carina, which resembles a tooth-like projection of the columella* 

 Columella rather deeply excavated, but showing no trace of a con- 

 tinuation around the umbilicus. The aperture is somewhat rhom- 

 boidal, the outer lip thickened within, sulcate from the margin 

 inward, corresponding to the lira? of the exterior. One of my 

 examples is dark red, the other dark ashen-gray, both sprinkled with 

 white dots. Alt. 11-13, diam. 14-16 mill. (Philippi) 



Habitat unknown. 



T. cruentus PHIL.. Abbild. u. Beschreib., i, Trochus, t. 4, f. 4 ; 

 Conchyl. Cab., p. 157, t. 25, f. 10. 



A species of uncertain generic position. May be a Gibbula. 



C. SORDIDUM Philippi. PI. 61, figs. 7, 8. 



Shell depressed-conoidal, narrowly umbilicate, transversely striate, 

 obliquely plicate, brown ; whorls depressed, cariuated just above the 

 sutures, the last bicariuated ; aperture rhombic-orbicular ; columella 

 oblique, toothed in the middle, continued above in a lobe partially 

 surrounding the umbilicus. (Phil.') 



The shell is pretty thin, depressed-conoidal above, consisting of 6 

 whorls. The uppermost are level, with an elevated keel just above 

 the suture, below the keel perpendicular. The last whorl has a 

 second keel around the periphery. The base is plano-convex. The 

 part of the whorl above the keel shows about 6 elevated transverse 

 lines, and closely crowded growth stria?, under a lens appearing 

 lamellar; and on the last whorl are oblique wave-like folds meeting 

 the incremental lines at right angles. The part between the keels 

 has 4 furrows ; the base has smooth, close, concentric stria?. The 

 aperture is broader than high, rhombic-circular ; the outyr lip thin ; 

 the throat smooth ; the columella is oblique, with a tooth in about 

 the middle, and above is prolonged in a lobe partly around the um- 

 bilicus. The umbilicus is narrow, cylindrical, not definitely bounded. 

 The color is dirty brown, somewhat tinged with green. 



Alt. 9, diam. 12 mill. (Philippi) 



Habitat unknown. 



T. sordidus PHILIPPI, Zeitschr. f. Mai., 1849, p. 191 ; Conchyl. 

 Cab., p. 301, t. 44, f. 1. 



