GASTEROPODA. 



119 



mantle often lobed and reflected over the shell ; eyes on the tentacles, or near 

 their base. Lingual ribbon linear ; rachis toothed ; pleura unarmed. 



VoLUTA, L. Volute. 

 T>/pe, V. musica, PI. VII., fig. 9. 



Si/ii., cymbiola, harpiila, Sw. VoluteUa, D'Orb. Scapha, &c., Gray. 

 Shell ventricose, thick ; spire short, apex mammillated ; aperture large, 

 deeply notched in front ; columella mth several plaits. V. musica and a few 

 others have a small operculum. 



Animal, eyes on lobes at the base of the tentacles ; siphon with a lobe on 

 each side, at its base ; lingual teeth 3 cusped. 



V. vespertilio and hebrcea fill the nuclei of their spires ^^dth solid shell. 

 V. brasiliana forms nidameutal capsules 3 inches long. (D'Orb.) In V. 

 mgidata the mantle is produced into a lobe on the left side, and overlaps the 

 sheU. 



W. Indies, Cape Horn, W. Africa, Australia, Java, Chili. 

 Chalk — . India, Brit., France, &c. 

 Volutllithes, Sw. Spire pointed, many-whii-led, colimiella 

 V. spinosus, PL VII., fig. 10. 

 (F. abyssicola), dredged at 132 fathoms ; off the Cape, 



Di^tr., 70 sp. 



Fosdl, 80 sp. 



Sub-genera. 

 plaits indistinct. 



L'mng, 1 sp. 

 (Adams). 



Fossil, Eocene, 



Brit., Paris. 

 Scapliella, Sw. Fusiform, smooth. 

 Ex., V, magellanica. Fossil, V. Lamberti, Crag, Suffolk 



Ilelo, Brod. Large, oval ; spire short. 

 Ti/pe, M. diadema, PI. VII., fig. 11. New Guinea, 8 sp, 



Cymba, Broderip. Boat-shell. 



Syn., Yetus (x\dans.) Gray. 



Type, C. proboscidaHs, PI. VII., fig. 12, and fig. 

 74 (= V. cymbium, L.) 



Shell like voluta ; nucleus large and globular ; 

 whhls few, angular, forming a flat ledge round the 

 uucleus. 



The foot of the animal is very large, aud deposits 

 a thin enamel over the under side of the shell. It is 

 ovo-vi\iparous, aud the young animal is very large 

 when born ; the micleus becomes partly concealed by 

 the growth of the shell. 



histr., 10 sp. W. Africa, Lisbon. 



MiTRA, Lam. Mitre- shell. 



Syn,, turris, Montf. Zierliaua, Gray. Tiara, 

 Sw. 



Cymba. 



