230 



MANUAL OF THE MOLLUSCA. 



on the tentacles, or near their base. 

 rachis, toothed; pleurm^ unarmed. 



Lingual ribbon linear; 



Fig. 89.» 



YoLrTA. L. Volute. 



Tijpe, Y. musica, PI. YII., Fig. 9. 



Synonyms, Cymbiola, Harpula, Sw. Yolutella, D'Orbigny. 

 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 have 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 hebrcea fill the nuclei of 

 their spires with solid shell. F. hrasiliana 

 forms nidamental capsules 3 inches long. 

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

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

 laps the shell. 



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. F. sjpinosus, PL YII., Fig. 10. 



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

 the Cape. (Adams.) 



Fossily Eocene. Britain, Paris. 



Scaphella, Sw. Fusiform, smooth. 

 Example, Y. magellanica. 



* Fig. 89. V. undulata, Lam. f Australia. (From Quoy and daimard.) 



Fig. 90. Valuta 

 (Wilton). 



