CANCELLARTA. 69 



sated by fine longitudinal ribs ; coluraellar plaits very prominent ; 

 orange-brown, often indistinctly bifasciate with a lighter tint. 

 Length, l'5-2'25 inches. 



West Coast of Central America, northwards 



to Gulf of California, 



The synonyms are C. ovata, Sowb. (fig. 18), and C. acuminata, 

 Sowb. (fig. 19). The latter figure shows a more exserted spire, 

 but there are intermediate forms connecting the three. 



C. URCEOLATA, Hinds. PI. 2, tig. 20. 



Slightly, narrowly shouldered ; fulvous straw-color to orange- 

 brown. Length, 34 mill. . 



West Coast of Central America to Mazatlan. 



Appears to differ from the preceding species mainly by the 

 development of fold-like ribs, which traverse the body-whorl as 

 well as the spire. 



C. CANDIDA, Sowb. PL 2, fig. 21. 



Whorls slightly round-shouldered at the suture ; yellowish 



white. Length, 32 mill. 



Polynesia. 

 C. AUSTRALIA, Sowb. PL 2, tig. 22. 



. Whorls rounded, decussated by close-set oblique longitudinal 

 ribs, and spiral ridges ; plaits three, moderate ; yellowish white. 



Length, 23 mill. 



New South Wales. 

 C. ALBIDA, Hinds. PL 2, fig. 23. 



Whorls slantingly shouldered, reticulated by corded ridges; 

 whitish ; columella with the two superior plaits prominent. 



Length, 31 mill. 



West Coast of Central America. 



C. GEMMULATA, Sowb. PL 2, fig. 24. 



Globosely ovate, solid, whorls scarcely angulated above ; plaits 

 three, subequal, moderate ; whitish. Length, 1 inch. 



West Coast of Central America. 



C. RETICULATA, Linn. PL 2, figs. 25, 26. 



Whorls spirally grooved and ribbed, the ribs low, flat, alter- 

 nately narrower and wider, crossed by less prominent obliquely 

 longitudinal ribs, sometimes forming obtuse granulations at the 



