CYPR^EA. 179 



having double orange lines on the dorsal surface. Length, 1*2 

 inches. 



C. Hamyi, Rochebr. (PI. 23, fig. 70), is a rosy white, yellowish- 

 tinted and spotted shell from Zanzibar ; it is probably a small 

 a a mi lux. The spots referred to are not shown on the figure 

 given by Dr. Rochebrune, but appear- on that of an nidus. 



C. Harmandiana, Rochebr., is well represented by figs. 60, Cl. 



C. Per rieri, Rochebr. (PI. 23, figs. 71 , 72 ), is one of those forms 

 connecting annul us with obvelata. 



In the report of the Voyage of the Samarang, Mr. Arthur 

 Adams says that while at Singapore, he observed the fry of G. 

 annulus (fig. 58) adhering to the mantle and other parts of the 

 animal in conglomerated masses of minute transparent shells, 

 which, when placed in a watch-glass of salt water, became dis- 

 integrated, and detached individuals were observed quitting the 

 rest and moving in rapid gyrations by means of two winged 

 membranous expansions. When at rest they returned to the 

 mass or adhered to the edge of the watch-glass. 



This and the following species are probably only varieties of 

 C. moneta, but the differences are usually so well marked that 

 they can be easily separated. The museum of the Acad. Nat. 

 Sciences of Philadelphia, however, contains a series of these 

 shells showing how they pass from one to another in regular 

 gradation. 



Dr. Rochebrune, who has studied this group with a view to 

 differentiation (Monograph of the genus Monetaria, Bull. Soc. 

 Malac., France, 1884). has selected a certain number of these 

 transitory forms for specific description, the names of which 

 have been given above; it would be easy to multiply them to 

 almost any extent. 



C. OBVELATA, Lain. PI. 11, figs. 55, 56. 



Sides thickened and putled out, giving the dorsal surface an 

 oval, intrenched appearance; back blue, teeth very strong. 

 Length, *G-1 inch. 



New Caledonia, Samoa, Australia. 



