172 CHLOROSTOMA. 



This form, of which a number of specimens are before me, is very 

 distinct from the other species. Its general aspect is that of an 

 EutrocJiHs. The whorls and base are flat ; and the color a light 

 fawn. It is the "Chlorostoma pfeifferi" of American writers on 

 Californian shells. 



C. STRiATULATUM Kiener. PI. 27, figs. 34, 35. 



Shell imperforate, conoid, apex subobtuse, covered with a brown 

 or cinereous unicolored cuticle ; whorls 6, separated by linear suture, 

 obliquely striate, transversely finely lirate, the lirae obsolete on the 

 last whorl ; last whorl slightly convex, carinate, beneath planulate 

 or slightly convex, marked with obsolete concentric lirse ; aperture 

 ample, rhomboid, the right margin oblique ; columella arcuate, 

 denticulate in the middle, emarginate below the denticle ; umbilical 

 area depressed. Alt. 18, diam. 21 mill. (Fischer.) 



Coast of California (.?) 



T. striatulatus Kiener, Species, gen. Trochus, t. 33, f. 3. — Fischer, 

 Coq. Viv., p. 106, t. 33, f 3. 



I have not seen this form, nor has it been mentioned by writers on 

 Californian mollusks. It differs, according to Fischer, from C. 

 montereyi, in the shorter more obtuse spire, more convex whorls and 

 in lacking an umbilicus. 



C. aureotinctum Forbes. PI. 27, figs. 31, 32, 33. 



Shell umbilicate, conoidal, thick, solid, black or cinereous ; spire 

 conical, apex generally eroded ; sutures impressed ; whorls about 5, 

 convex, spirally coarsely ridged below, radiately plicate above ; the 

 revolving ridges 5 in number, the folds of the upper surface dis- 

 appearing with age ; base rounded, concave around the umbilicus ; 

 periphery rounded ; aperture oblique ; columella with a blunt tuber- 

 cle in the middle and a smaller one below it, slightly reflexed above, 

 joined to the upper margin by a heavy white callus extending across 

 the parietal wall ; umbilicus wide, deep bright orange-colored within. 



Alt. 38, diam. 35 ; alt. 22, diam. 26 mill. 



California and L. California. 



T. aureotindus Forbes, P. Z. S. 1S50, p. 271, t. 11, f 7.— Car- 

 penter, Eept. on Moll. W. Coast JSf. A., p. 652. — Fischer, Coq^ 

 Viv. (gen. Turbo), p. 94, t. 31, f 1. — Turbo cateniferus Kibser, 

 Species, genre Turbo, t. 31, f 1 (not T. catenijerus Pot. et Mich.). 



The more prominent features of this species are found in the 

 heavy, solid shell, coarsely ridged below and the orange-colored 



