GASTEROPODA. 229 
Indies and Brazil, 20. The typical species about 20 (China, 16; 
West America, 4). Low water to 100 fathoms. 
Fossil, 878 species. Chalk—. Britain, France, &c. Chili. 
Sub-genera, Drillia, Gray. D. umbilicata, canal short. 
Clavatula, Lam., canal short, operculum pointed, nucleus in 
the middle of the inner edge. C. mitra, Pl. VII., Fig. 4. 
Tomella, Sw., canal long; inner lip callous near suture. T. 
lineata. 
2 Clionella, Gray. C. sinuata, Born species. (= P. buccinoides), 
freshwaters, Africa. 
Mangelia, Leach (not Reeve). Apertural slit at the suture ; 
no operculum, M. tzeniata, Pl. VII., Fig. 5. Greenland, Britain, 
Mediterranean. 
Bela, Leach. Operculum nucleus apical. B. turricula, Pl. 
abt. Bic, 6. 
Defrancia, Millet,* no operculum. OD. linearis, Pl. VII., 
Bis. 7. 
2 Lachesis, Risso, Lu. minima, Pl. VII., Fig. 8, apex mam- 
millated ; operculum claw-shaped. Mediterranean, South 
Britain, Japan. In shallow water. 
Daphnella, Hinds. D. marmorata, New Guinea. (Buc. 
junceum. IL. clay). 
Borsonia, Edwards. 2 species recent; tropical seas. Lossil, 
6 species. Tertiary. Europe. 
CirHARA, Schumacher. 
Etymology, cithara, a guitar. 
Synonym, Mangelia, Reeve (not Leach). 
Type, cancellaria citharella, Lam. (cithara striata, Schum.),. 
Shell fusiform, polished, 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.—VoOLUTIDA. 
Shell turreted, or conyolute; aperture notched in front; 
columella obliquely plaited. No operculum. 
Animal with a recuryed siphon ; foot very large, partly hiding 
the shell; mantle often lobed and reflected over the shell; eyes 
* According to Mr. 8, Hanley, Defrancia is synonymous with Mangelia, 
