230 



MANUAL OF THE MOLLUSCA. 



on tlie tentacles, or near their base. Lingual ribbon linear; 

 rachis, toothed ; jpleurce, unarmed. 



Fig. 8&.* 



YoLUTA. L. Volute. 



Yolutella, D'Orbigny. 



Type, y. musica, PI. VII., Fig. 9. 

 Synonyms, Cymbiola, Harpula, Sw. 

 Scapha, &c., Gray. 



Shell ventricose, thick ; spire short, apex mammillated ; 

 aperture large, deeply notched in front ; colu- 

 mella with several plaits. V. musica and a few 

 others haye a small operculum. 



Animal eyes on lobes at the base of the ten- 

 tacles ; siphon with a lobe on each side, at its 

 base ; lingual teeth 3-cusped (Fig. 90). 



V. vespertilio and hehrcea fill the nuclei of 

 their spires with solid shell. F. hrasiliana 

 forms nidamental capsules 3 inches long. 

 (D'Orbigny.) In V. angulata the mantle is 

 produced into a lobe on the left side, and over- 

 Fig. 90. Valuta laps the shell. 



(Wilton). Distribution, *70 species. West Indies, Cape 



Horn, "West Africa, Australia, Java, Chili. 

 Fossil, 80 species. Chalk — . India, Britain, France, &c. 

 Suh-genera, Volutilithes, Sw. Spire pointed, many-whorled, 

 columella plaits indistinct. V. spinosus, PL VII., Fig. 10. 



Living, 1 species (F. ahyssicola), dredged at 132 fathoms; ofif 

 the Cape. (Adams.) 

 Fossil, Eocene. Britain, Paris. 



Scaphella, Sw. Fusiform, smooth. 

 Example, V. magellanica. 



* Fig. 89, V. undulata, Lam. | Australia. (From Quoy and Gaimard.) 



