202 TRIVIA. 



dots, two on each side of the dorsal groove, alternating one with 

 the other ; ribs fine. Length, '20-'35 inch. 



The T. rotunda, Kiener. West Indies, Florida. 



T. EXIGUA, Gray. PL 22, figs. 9, 10, 17. 



Ovate, .extremities produced, beaked, white, stained and varie- 

 gated with bright rose, ribs fine. Length, -15--2 inch. 



Sandwich Islands, New Caledonia. 



A most beautiful little shell, described also by Duclos, as T. 

 tremeza, and by Dr. Gould, as T. gemmula. 



T. corrugata, Pease (fig. 11), differs in having fewer and 

 stronger ribs ; the pink color is not so persistent, some of the 

 specimens being pure white. 



5^*^ Shell brownish. 

 T. RADIANS, Lam. PL 22, figs. 13, 14, 11, 12. 



Rotundly ovate, sides dilated, dorsal impression broad, nodose 

 on each side, the ribs diverging from the nodules, back stained 

 with a dark blotch, base depressed. Length, -65-'8 inch. 



Lower California, Ecuador. 



T. rota, WeinkaufF (figs. 11, 12), is a distant variety with a 

 color more diffused and nearer T. Solandri. 



T. SOLANDRI, Gray. PL 22, figs. 15, 16. 



More rounded at the base than the preceding, from which it 

 can be easily distinguished by its minute row of outer teeth, 

 there being an intermediate one between each of those termi- 

 nating the ribs. Length, -55--80 inch. 



Santa Barbara, Cal. Acapulco. 



T. COSTIS-PUNCTATA, Gask. PL 22, figs. 7, 8. 



Closely allied to T. radians. Its color is that of the ordinary 

 T. pediculus, the ribs are spotted, and the dorsal groove is 

 narrow, the base is rounded. Length, *6 inch. Hob. (?) 



T. CALIFORNIA, Gray. PL 22, figs. 18, 19, 20, 3T. 



Ovate, rather globose ; ribs distant, dorsal impression faint, 

 whitish ; teeth whitish. Length, '35-'55 inch. California. 



The animal is vivid orange-scarlet, reddish brown at the end 

 of the proboscis. When the mantle is extended over the back 

 of the shell its color is neutralized by the purple of the latter. 

 T. depauperata, Sowb. (fig. 31), was described from a worn 

 specimen. 



