6 



COM PA RA TI VE A NA TOM Y 



b. Taenioglossa. — Typical radula, 2.1. 1.1. :2. Semiproboscidifera. Fam. 

 Naticidcc (Fig. 98, p. 107), Lamellaridce. Rostrifera. Fam. Vidraddir (fresh-water), 

 Ampullaridcc (fresh - water), Littorinidce, Cyclostomidcc (terrestrial), Planaxidce, 

 Hydrobiidic (fresh-water), Acinilidce (terrestrial), Truncatellidce (partly terrestrial), 

 Hipponycida, Capulida, Calyptraeidcc, Pse^idomclanidcc, Melanidm, Ccrithiidce, 



Fig. 6.— Rostellaria rectirostris (after Owen). ((, Snout ; h, tentacle ; c, stalked eye ; d, foot ; 

 e, metapodiuiii with opercuhua/; h, beak (for the siphon). 



Fermetidcc, TurritelUdir, Xcnophoridce (Fig. 5), StnUliiolarida', Clicnopidcc, 

 Strombidce (Fig. 6). Proboscidifera holostomata. Fam. Scalaridcc, rad. ^Ox ; 

 Solaridcc, rad. ccOco ; rymmidcJlidcc, rad. 0; Eulimidce, rad. 0. Proboscidifera 

 siphonostomata. Fam. Colomhdlinidoc, Tritoniidcc, C'assidiidce (Fig. 7), Doliidce. 



Fig. 7.— Cassis suclosa (after Poll). 

 eye ; /, tentacle ; h, foot; i, opeicnluni. 



Shell ; h, beak ; c, siphon ; (?, head ; g, proboscis ; c, 



Janthinidse, rad. ccOco. Heteropoda (marine Taenioglossa, with foot transformed 

 into a perpendicular rowing fin). Fam. Atlantidrc (Fig. 8), Pfcrotracliaeidcc 

 (Fig. 9). 



c. Stenoglossa. — Normal rad. 1.1.1. Rachiglossa. Fam. Turbindlidcc, 

 Fusidce, Mitridn\ Buccinidce, Muricidn; Purpuridu^ Haliadca, Cancellariidce, 

 Vohitidcc, Olivldce, Marginellidce, Harpidcc. Toxiglossa. Fam. Phurotomidcc. 

 Terebridce, Conidcc. 



