GASTEHOPOBA. 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. 



Suh-genera, BriUia, Gray. D. umbilicata, canal short. 



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

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



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

 lineata. 



? CUonella, Gray. C. sinuataj Born species. (== P* buccinoides), 

 freshwaters, Africa. 



Mangelia^ Leach (not Peeve). Apertural slit at the suture 5 

 no operculum, M. tseniata, PI. YIL, Pig. 5. Greenland, Britain, 

 Mediterranean . 



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

 TIL, Pig. 6. 



Defranda^ Millet,* no operculum. D, linearis, PI. YIL, 

 Pig. 7. 



? Lachesis, Eisso, L. minima, PL YIL, Pig. 8, apex mam- 

 millated ; operculum claw - shaped. Mediterranean, South 

 Britain, Japan. In shallow water. 



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

 junceum. L. clay). 



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

 6 species. Tertiary. Europe. 



ClTHARA, Schumacher. 



Etymology, citliara, a guitar. 



Synonym, Mangelia, Peeve (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; outor lip margined, denticulated within; inner lip 

 finely striated. Operculum. 



Bistrihution, above 50 species of this pretty little genus were 

 discovered by Mr. Cuming in the Philippine Islands. 



Family Y. — YoLTTTroiE. 



Shell turreted, or convolute ; aperture notched in front J 

 columella obliquely plaited. No operculum. 



Animal with, a recurved siphon ; foot very large, partly hiding 

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



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



