192 CHLOROSTOMA. 



C. SCABRICULUM v. d. Busch. PL 61, figs. 16, 17, 18. 



Shell depressed-conic, umbilicate, pale reddish, marbled with white 

 and brown spots, sculptured with frequent rugose transverse cinguli, 

 the middle of the upper surface angulated ; last whorl subangulate, 

 submarginate ; aperture suborbicular within ; columella denticulate 

 at the outer basal portion, produced in a callous partly surrounding 

 the umbilicus above. Umbilicus moderate, terete. (Phil.) 



The shell is depressed-colloidal, pretty thick, and consists of 5 J 

 whorls. These are very regularly convex, sometimes somewhat 

 angular in the middle, the last one at the periphery often much 

 more distinctly carinate than in the figure, and slightly margined. 

 On the upper surface of the penultimate whorl one sees 6 to 8 lirse, 

 separated by narrow interstices, and irregularly uneven and 

 wrinkled, not regularly gran u lose. This is especially true of the 

 upper ones, and the middle one, which sometimes makes the whorl 

 angular. The last whorl has above numerous spiral lira? ; the flat 

 base has 10, which are smooth, regular, and separated by deep nar- 

 row interstices. The umbilicus is moderate, and in each whorl is 

 cylindrical. The aperture is circular within ; the columella has at 

 the outer base a little pit, as if something had been broken off', and 

 three little denticles ; above it is continued in a callous which sur- 

 rounds one-third of the umbilicus. The basal lip has within a 

 broad, rather deep furrow, parallel with its edge. The furrow is 

 clear reddish-brown, marbled with dark brown and white dots ; the 

 base lighter, regularly marked, the umbilical tract white. 

 Alt. 9, diam. 14 mill., generally smaller. 



West Indies. 



T. scabriculus (v. d. Busch in //.) PHIL., Zeitschr. f. Mai. 1848, 

 p. 125 ; Conchyl. Cab., p. 178, t. 28, f. 5. 



C. PATAGONICUS d'Orbigiiy. PL 13, figs. 88, 89.. 



Shell orbiculate-conic, thick, umbilicate, transversely narrowly 

 granulose-sulcate, uniform brownish or purplish ; spire conic, apex 

 obtuse ; whorls 5, subcarinate ; sutures excavated ; aperture rounded ; 

 columella bidentate. Alt. 11, diam. 14 mill. (Orb.) 



^Bay of San Bias, Patagonia. 



T. patagonicus ORB., Voy. dans 1'Amer. Merid., p. 408, t. 55, f. 

 1-4. PHILIPPI, Conchyl. Cab., p. 225, t, 34, f. 12. 



C. CORRUGATUM (Koch) Philippi. PL 41, figs. 34, 35. 



Shell orbicular-conoid, umbilicated, dull flesh-colored ; whorls 

 rather convex, transversely silicate, roughly reticulated by impressed 



