COMPARATIVE ANATOMY 



CHAP. VII 



b. Taenioglossa. Typical radula, 2.1.1.1.2. Sezniproboscidifera. Fam. 

 Naticidce (Fig. 98, p. 107), Lamellaridce. Eostrifera. Fam. Valvatidce (fresh-water), 

 Ampullaridce (fresh - water), Littorinidte, Cyclostomidce (terrestrial), Planaxidce, 

 Hydrobiidce (fresh- water), Aciculidce (terrestrial), Truncatellidce (partly terrestrial), 

 Hipponycidce, Caputtdce, Calyptraeidce, Pseudomclanidce, Melanidce, Cerithiidce, 



FIG. 6. Bostellaria rectirostris (after Owen). ", Snout ; b, tentacle ; c, stalked eye ; d, foot ; 

 e, metapodium with operculum /; h, beak (for the siphon). 



Vermetidce, Turritellidw, Xcnophoridcc (Fig. 5), Struthiolaridce, Cltcnopidcc, 

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

 Solaridcc, rad. ocQoo ; Pyramidcllidce, rad. 0; Eulimidce, rad. 0. Proboscidifera 

 siphonostomata. Fam. Colombellinidce, Tritoniidcc, Cassidiidce (Fig. 7), Doliidce. 



FIG. 7. Cassis suclosa (after Poll), o, Shell ; b, beak ; c, siphon ; d, head ; g, proboscis ; c, 

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



Janthinidse, rad. ooO oo . Heteropoda (marine Taenioglossa, with foot transformed 

 into a perpendicular rowing fin). Fam. Atlantidce (Fig. 8), Pterotrachaeidce 

 (Fig. 9). 



c. Stenoglossa. Normal rad. 1.1.1. Rachiglossa. Fam. TurUnellidce, 

 Fusidce, Mitridce, Buccinidce, Muricidcc, Purpuridce, Haliadea, Cancellariidce, 

 Volutidce, Olividce, Marginellidce, Harpidce. Toxiglossa. Fam. Pleurotomidce, 

 Terebridce, Conidce. 



