124 GARRETT: CATALOGUE OF CYPR^ID^E. 



colored, the base more flattened, the raised dots less numerous 

 and more irregular in shape and size. The teeth are coarser, 

 more yellowish, and do not extend across the face of the 

 shell as in Z; staphylcea. 



Our largest Viti example is 30 mill, in length, which is 

 nearly twice the size of our largest T. staphylcea. As near as 

 I can recollect, the animal is of a beautiful vermiUon red 

 color. 



The above two species, together with T. cojisobrina, are 

 no doubt closely connected by intermediate forms, but I 

 have not sufficient material to trace them through all their 

 variations. Trivia globulus and cicercula are in the same 

 category; the two species gradually merging into each other. 



69. T. (Epona) margarita, Sol. Rare; under dead coral on 

 the outer reefs at the Society and Paumotu Islands. It is 

 very abundant at Swain's Island, whence we received several 

 hundred examples. 



If Dillwyn has correctly determined and described 

 Solander's T. margarita, this most eertainly cannot be that 

 shell. As stated in my notes on T. globulus, his short descrip- 

 tion accords exactly with the Polynesian type of the latter 

 species. 



The following is a copy of Dillwyn's description: — 

 "Shell half an inch long and two thirds as broad; nearly 

 globular, strikingly beaked at both ends, and white, without 

 any markings. The margin is only slightly thickened, and 

 the spire is distinctly umbilicated, so that it might perhaps be 

 placed with equal propriety next to C. ursellus, in the 

 umbilicate division, though Born, Scroeter, and GmeUn have 

 confounded it with C. globulus." 



The species now under consideration is ovate, the ends 

 slightly produced, right margin thickened and the teeth 

 small. The color is creamy-white, rarely pale fawn, ivory 



J.C, \\., April, 1879 



