616 



APPENDIX. 



Fam. VOLUTION. 



The lingual membrane linear; teeth in a single central 

 series. Siphon of the mantle very short, recurved. Foot very 

 large, and often deeply nicked on the side in front. 



Operculum annular, or none. 



Shell with a nick in front for the siphon. The front of the 

 pillar regularly and deeply plaited. 



Sub-fain. VOLUTINS. 



Teeth broad, lunate; apex three-lobed. Tentacles far apart, 

 united together by a broad veil forming a hood over the head ; 

 eyes situated far back, behind the base of the small tentacles. 

 Mantle sometimes greatly developed, covering the sides of the 

 shell ; base of siphon furnished with auricles on the sides. 



Genus CYMBIUM, Klein (Yetus, Adanson). 



cymbium, Linn. olla, Linn. 



gracile, Brod. porcinum, Lam. 



navicula, Gmel. proboscidale, Lam. 



Neptuni, Gmel. (patulum, rubiginosum, Swains. 

 Brod. Tritouis, Brod.). 



Genus MELO, Humphrey (Cymbium, Mo?iif.). 



iEthiopica, Linn. 

 armata,Law.(sentieosa,-Boft.). 

 Broderipii, Gray. 

 diadema, Lam. (ramosa, 



Meusch.). 

 Georginae, Gray (mucro- 



nata, Brod.). 



me\o, Soland. (Indica.,Gmel). 

 Miltonis, Gray. 

 nautica, Lam. 

 tesselata, Lam. 

 umbilicata, Brod. 



nivosa, Lam. 

 Norrisii, Sow. 

 pulchra, Sou-. 



Genus SCAEHA, Gray. 



rutila, Brod. 

 vespertilio, Linn. 



