50 CONUS. 



C. PLANORBIS, Born. PI. 14, fig. 81. 



Whorls of spire striate, maculate with chestnut ; body-whorl 

 with beaded striae below, orange-brown or chestnut, frequently 

 light-banded in the middle, and sometimes at the shoulder also, 

 base darker-colored. Length, 1-25-2 inches. 



Mauritius, Ceylon, New Caledonia, Philippines, Polynesia. 



This species is called C. senator, Linn., by Reeve and others, 

 but the description in the Systema Naturae shows that the iden- 

 tification is wrong. Hanley was not able to identify C. senator 

 in the Linnean collection. Sometimes the granular striae cover 

 the entire surface. 



C. CIRCUMSIGNATUS, Crosso. PI. 14, fig. 82. 



Shell covered with orange-brown upon the body-whorl except 

 at the shoulder, base and centre, where occur irregular bands or 

 blotches of white, with narrow articulated lines of chestnut and 

 white, sparingly maculated with orange-brown. Length, 30 mill. 



Habitat unknown. 



Dr. Weinkauff makes this the granular variety of C. 

 planorbis; he has evidently mistaken the articulations for 

 granulations. 



C. CHENUI, Crosse. PL 14, figs. 83, 84. 



Shell thin, with depressed carinate and striate spire, which is 

 yellowish, maculated with brown ; body-whorl striated below, 

 yellowish, with two series of longitudinal forked and irregular 

 dark brown markings, interrupted in the middle and at the base; 

 there are traces of distant narrow brown revolving lines ; 

 aperture white. Length, 2 inches. 



New Caledonia. 



In the Journal de Conchyliologie, 1874, Crosse says that this 

 species is very close to some varieties of C. planorbis, but its 

 system of coloration is more elegant. C. Loebbeckeanus, Weink. 

 (fig. 84), appears to me to be only a slight color-variation. 

 Finally, C. Chenui is closely related to varieties of the next 

 species. 



C. LINEATUS (Chemn.), Auct. PI. 14, fig. 85. 



Shell orange-brown to dark chestnut, finely narrowly lineated 

 with a darker color, with white blotches arranged in upper, middle 



