GASTEROI'ODA. 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. 



Bvh-gentra^ Brillia, Gray. D. imibilicata, canal short. 



C^lavatida, Lam., canal short, operculum pointed, nucleus in 

 the middle of the inner edge. C. mitra, PL VII., Pig. 4. 



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

 lineata. 



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

 freshwaters, Africa. 



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

 no operculum, M. taeniata, PI. VIL, Fig. 5. Greenland, Britain, 

 Mediterranean. 



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

 VIL, Fig. 6. 



Defrancia^ Millet,* no operculum. D. linearis, PI. VIL, 

 Pig. 7. 



? Lachesis, Eisso, L. minima, PI. VIL, Pig. 8, apex mam- 

 millated ; operculum claw - shaped. Mediterranean, South 

 Britain, Japan. In shallow water. 



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

 junceum. L. clay). 



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

 6 species. Tertiary. Europe. 



ClTHARA, Schumacher. 



Etymology^ cithara, a guitar. 



Synonym, Mangelia, Eeeve (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. 



Distribution, above 50 species of this pretty little genus were 

 discovered by Mr. Cuming in the Philippine Islands. 



Family V. — Yq-lvti-dje, 



Shell turreted, or convolute ; apertui-e notched in front ; 

 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, Dcfrancia is aynonjTuoue with Mangelia. 



