118 MANUAL OF THE MOLLUSCA. 



Pleurotoma, Lam. 



I 



i 



Mym., pleura, tlie side, and toyna, a notch. Syn., turns. Humph. 



Types, P. Babylonica, PL VII., fig, 3. P. mitrteformis, &c. 



Shell fusiform, spire elevated ; canal long and straight ; outer lip wdth a 

 deep slit near the sutm-e. Operculum pointed, nucleus apical. 



Distr., 430 sp. World-wide. Greenland, Brit., 17 ; Medit., 19 ; Africa, 

 15; Red Sea and India, 6 ; China, 90; Australia, 15; Pacific, ? W. Ij 

 America, 52 ; W. Indies and Brazil, 20. The typical sp. about 20 (China, { 

 16 ; W. America, 4.) Low water to 100 fathoms. 



Fossil. 300 sp. Chalk—. Brit., Prance, &c. Chile. 



Sub-genera. Drillia, Gray. D. umbilicata, canal short. 



Clavatida, Lam., canal short, operc. pointed, nucleus in the middle of the 

 iimer edge. C. mitra, PI. VIL, fig. 4. 



Tornella, Sw., canal long ; inner lip callous near sutm-e. T. lineata. 



? Clionella, Gray. C. sinuata, Born sp. (= P. buccinoides) fresh waters, 

 Africa. 



Mangelia, Leach, (not Reeve). Apertmal slit at the sutm-e ; no operc, 

 M. tseniata, PI. VII., fig. 5. Greenland, Brit., Medit. 



Bela, Leach. Operc. nucleus apical. B. tm-ricula, PI. VIL, fig. 6. 



Defraucia, MiUet,* no operc. D. linearis, PI. VIL, fig. 7- 



? Lachesis, Risso, L. minima, PI. VIL, fig. 8, apex mammillated ; operc. 

 claw-shaped. Medit., S. Brit. In shallow water. 



BapJinella, Hinds. D. marmorata. New Guinea. (Buc. junceum. L. clay). 



FAMILY V. VoLUTiD^. 



Shell turreted, or convolute ; aperture notched in front ; columella ob- 

 liquely plaited. No operculum. 



Fig. 73. t 

 Animal \rith a recurved siphon ; foot very large partly hiding the shell ; 



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

 t Fig. 73. V. undulata, Lam. h Australia (from Quoy and Gaimard), 



