OLATHURELLA. 275 



C. TORQUATA, Philippi. PI. 20, fig. 78. 



Rather thin, subdecussate, whorls with sloping shoulders, th^ 

 angle set with small tubercles. Length, 1 inch. 



Mediterranean, deep sea. 



Originally described as a fossil from Calabria, but recent 

 specimens have been dredged at several localities. It is PL 

 recondita, Tiberi. 



C. PURPUREA, Montagu. PI. 18, figs. 40, 41. 



Whorls usually well rounded, clathrate by narrow ribs and 

 almost equally strong revolving ridges ; reddish or purplish 

 brown, white-zoned below the middle of the body-whorl, the zone 

 distinct within the lip. Length, 12-19 mill. 



Europe, Canary Islands. 



Yar. PHILBEBTI, Mich. (fig. 41). Shell dwarf, more solid, fewer 



ribs, often particolored (P. bicolor, Risso). 

 Yar. LA Vi-as, Phil. More lengthened and smaller than the type, 



very regularly trellised. It is the var. oblonga of Jeffreys 



and P. corbis, Midland. 

 Yar. MAJOR, Monts. Length, 26 mill. 

 Yar. ATRA, Monts. Uniform dark chocolate. 

 Yar. FLAVIDA, Monts. Light yellowish, a little roseate. 

 Yar. ALBIDA, Bucq., Dautz. et Dollf. White. 

 Yar. BICOLOR, Risso. Brown with large white spots. 

 Yar. LINEOLATA, Bucq., Dautz. et Dollf. A brown line between 



each ridge. 



C. CORDIERI, Payr. PI. 32, fig. 34 ; PL 18, fig. 35 ; PI. 20. fig. 79. 

 Ribs and revolving ridges higher and sharper, and not so 

 numerous as in the preceding species, the intersections produced, 

 prickly, aperture more attenuated into a canal below ; yellowish 

 brown, irregularly mottled or streaked with chestnut. 

 Length, 13-25 mill. 



Europe. 

 Yar. CANCELLATA, Sowb. A large form, with convex whorls; 



white or light purplish with a lighter central band. 

 Yar. PUNGENS, Monts. Shell small, thick ; brownish, with white 



blotches. 

 Yar. HISTRIX, Jan. Intersections of the sculpture spinose. 



