178 CYPR^A. 



C. icterina, Lam. (PI. 23, fig. 62), is a smooth, elongate 

 variety. 



C. Barthelemyi, Bernard! (PI. 11, figs. 53, 54), is a distorted 

 variety from New Caledonia. Length, 1'45 inches. 



C. ethnographica, Rochebr. (PI. 23, fig. 63), is a small tuber- 

 culated form, ornamented with a } 7 ellow ring. 



G. mercatorium, Rocliebr. (PI. 10, fig. 40; PI. 11, fig. 52), is 

 dirty yellowish, lightly olive-tinted, and not so strongly tuber- 

 culated. 



G. atava, Rochebr. (PI. 23, figs. 64, 65), is a small example of 

 G. mercatorium. 



G. pleuronectes, Rochebr. (PI. 23, figs. 66, 67), resembles 

 somewhat the G. icterina. 



G. vestimenti, Rochebr., is another name for the distorted 

 variety Barthelemyi. 



C'. camelorum, Rochebr. (PL 23, fig. 68), is a small smooth 

 oval form, which Dr. Rochebrune says he has collected alive in 

 large quantities on the West Coast of Africa. 



G. plumaria, Rochebr. (PI. 23, fig. 69), is a narrow-banded 

 form, credited to the Sandwich Is. It appears to be a less 

 developed ataua. 



Dr. Rochebrune, in a monograph of the mollusks of Cape 

 Yerd Is., says he has fished G. moneta alive at Senegal. 



' The species is found fossil in the conglomerate of Santiago, 

 C. Verd. 



C. ANNULUS, Linn. PL 11, figs. 57-61 ; PL 23, figs. 70-72. 



Smooth, smoky white ; dorsal surface ornamented with a deep 

 orange ring, which encircles a bluish or grayish centre ; teeth 

 strong, base smooth. Length, '45-1 - 2 inches. 



Indian and Pacific Oceans. 



Fossil in the Tertiary of Southern Europe. Dr. Layard found 

 specimens in the ruins of Nimrod, which had the appearance of 

 having been used for adornment. 



G. Noumeensis, Marie (fig. 59), is a New Caledonian variety 



