174 CYPR^EA. 



*** Spots extending over the base. 

 C. MAPPA, Linn. PI. 7, figs. 12-14 ; PL 8, fig. 1 7. 



Back violet-brown, arranged in longitudinal lines of a hiero- 

 glyphic character, dorsal line whitish and peculiarly branched ; 

 sides and base whitish to pink, teeth saffron-red, numerous, and 

 confined to the interior of the aperture ; base sometimes orna- 

 mented on the columellar side with a violet blotch. 



Length, 2-3-3-4 inches. 



Xcw Caledonia, Java, Indian 0. 



C. nigricans, Montr. (PI. 8, fig. 17), is a rostrate variety from 

 New Caledonia, the dorsal surface of which is black. 



Length, 3'85 inches. 



C. ARABICA, Linn. PL 8, figs. 18, 19, 23, 24. 



Back livid brown, with a line ornamentation similar to C. 

 mappa, the dorsal line is straight and the spots more numerous, 

 those on the sides being dark-brown, base tinged brownish ; teeth 

 reddish brown; extremities blackish. Length, 1-6-3 inches. 



Samoa, New Caledonia, Australia, Indian Ocean. 



Young shell bluish, banded with brown waves. Animal black- 

 brown, with a yellow edge to the foot. C. ct/la/ifina, Duel. (fig. 

 24), is a grayish variety with white spots, improperly credited 

 to California. 



An oblong, rostrate, dark-brown or nearly black form, with 

 black spots and a whitish base and beaks, found at New Cale- 

 donia, has been incorrectly identified as cyhiHtina. For this 

 variety I propose the name niger (fig. 23). 



C. RETICULATA, Martyn. PL 8, figs. 20-22. 



Differs from C. Arabica, its nearest ally, in being broader 

 and having more thickened sides, the dorsal spots are more 

 crowded and sometimes run together, presenting a clouded sur- 

 face ; base dull milky-white to bluish, the columellar side orna- 

 mented with a dark reddish brown blotch near the middle of 

 the shell ; teeth stronger than those of C. Arabica, but similarly 

 colored ; aperture wider. Length, 1-4-3 inches. 



Indian and Pacific Oceans. 



This species sometimes very closely resembles the preceding. 

 It can, however, be distinguished by the increased number of the 



