TOXOGLOSSA TAENIOGLOSSA. 397 



Fam. 6. Fasciolaridae. Shell fusiform ; spire long ; operculum corneous ; 

 head small ; short tentacles, with eyes at base ; siphon moderate. Fasciolaria 

 Lam. ; Fusus Lam. 



The Turbinellidae (Hemifusus Swainson; Fidgur Montf. ; Latirus Montf. ; 

 Lagena Schum.) are allied here. f, 



Fam. 7. Mitridae. Tentacles carrying eyes laterally; proboscis long; shell 

 fusiform, spire pointed; operculum absent. Mitra Lam., mitre-shell; Thala 

 Ad. ; Turricula Ad. 



Fam. 8. Volutidae. Head flattened, and prolonged laterally into lobes, on 

 which are the eyes. Proboscis short ; siphon with interior appendages ; operculum 

 generally absent. Valuta L. ; Guivillea Watson ; Cymba Brod. and Sow. , boat- 

 shell; Cyinbium Montf. 



Fam. 9. Olividae. Anterior part of foot separated by a transverse furrow, 

 rnesopodium reflected laterally over the shell; eyes placed half-way up the 

 tentacles ; shell olive-shaped ; operculum present or absent. Oliva Brug. , olive- 

 shell ; Olivella Swainson ; Ancillaria Lam. ; Olivancillaria d'Orb. 



The Harpidae (Harpa Lam., harp-shell) and Marginellidae (Marginella Lam.) 

 are allied here. 



Tribe 3. TOXOGLOSSA. 



Radula without median and lateral teeth (except Spirotropis), 1.0.0.0.1. 

 Oesophagus with a large poison gland ; siphon and proboscis well developed ; 

 carnivorous. 



Fam. 1. Terebridae. 

 Eyes at end of tentacles ; Si 

 foot small; shell turricu- 

 lated. Terebra Adanson, 

 auger- shell. 



Fam. 2. Conidae. Eyes 

 on outer side of tentacles; 

 siphon prominent ; shell 

 conical. Oonus L., cone- ~J* 



shell (Fig. 313); Bda Leach; FIG. 313. Conus textilis (regne animal). R proboscis; ,s 

 Clavatula Lam. ; Drillia si P hon 5 F tentacle ; eye ; P foot. 

 Gray ; Conorbis Sow. 



Fam. 3. Cancellariidae. Proboscis short, usually no radula; no operculum ; 

 vegetable feeders. Cancellaria Lam. 



Tribe 4. TAENIOGLOSSA. 



Radula with normal formula 2.1.1.1.2. (Fig. 293 B). Marginals sometimes 

 numerous. 



There are two sections, the Platypoda and Heteropoda. 



Section 1. Platypoda. 



Normal creeping Pectinibranchs, little modified. Foot more or less flattened 

 ventrally. Rarely with accessory glands on the generative ducts (Paludina, 

 Cyclostoma, Naticidae, etc. ). Generally with jaws. 



Fam. 1. Naticidae. Foot very large, partly covers shell ; propodium reflected 

 on the head ; shell semi-globular, spire small ; operculum. Eyes often absent, 

 carnivorous, feeding on bivalves. Natica Lam. ; Sigaretus Lam. 



