GASTEROPODA. 229 



Indies and Brazil, 20. The typical species about 20 (China, 16 ; 

 West America, 4). Low water to 100 fathoms. 



Fossil, 378 species. Chalk — . Britain, France, &c. Chili. 



Siib-genera, Drillia, Gray. D. Timbilicata, canal short. 



Clavatula, Lam., canal short, operculum pointed, nucleus in 

 the middle of the inner edge. C. mitra, PI. YIL, Fig. 4. 



Tomella, Sw., canal long; inner lip callous near suture. T. 

 lineata. 



? CUonella, Gray. C. sinuata. Born species. (=- P. buccinoides), 

 freshwaters, Africa. 



Mangelia, Leach (not Eeeve). Apertural slit at the suture ; 

 no operculum, M. tseniata, PI. VII., Fig. 5. Greenland, Britain, 

 Mediterranean. 



Bela, Leach. Operculum nucleus apical. B. turricula, PI. 

 VII., Fig. 6. 



Defranda, Millet,* no operculum. D. linearis, PL VII., 

 Fig. 7. 



? LacJiesis, Eisso, L. minima, PI. VII., Fig. 8, apex mam- 

 millated ; operculum, claw - shaped. Mediterranean, South 

 Britain, Japan. In shallow water. 



Baphnella, Hinds. D. marmorata, New Guinea. (Buc. 

 junceum. L. clay). 



Borsonia, Edwards. 2 species recent ; tropical seas. Fossil, 

 6 species. Tertiary. Europe. 



CiTHARA, Schumacher. 



Etymology, cithara, a guitar. 



Synonym, Mangelia, Eeeve (not Leach). 



Type, cancellaria citharella. Lam. (cithara striata, Schum.). 



Shell fusiform, j)olished, ornamented with regular longitudinal 

 ribs; aperture linear, truncated in front, slightly notched 

 behind ; outer lip margined, denticulated within ; inner lip 

 finely striated. Operculum. 



Distribution, above 50 species of this pretty little genus were 

 discovered by Mr. Cuming in the Philippine Islands. 



Family V. — Voluttd^. 



Shell turreted, or convolute ; aperture notched in front ; 

 columella obliquely plaited. No operculum. 



Animal wiih. a recurved sijDhon ; foot very large, partly hiding 

 the shell ; mantle often lobed and reflected over the shell ; eyes 



* According to Mr. S. Hanley, Defrancia is synonymous with Mangelia, 



