COMPARATIVE ANATOMY 



CHAP. VII 



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

 Naticidce (Fig. 98, p. 107), Lamellaridce. Rostrifera. Fam. Falvatidce (fresh-water), 

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

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

 Hipponycidce, Capulidce, Calyptraeidce, Pseudomelanidce, Melanidce, Cerithiidce, 



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

 e, inetapodium with operculuin /; h, beak (for the siphon). 



Vermetidce, Turritellidce, Xenophoridce (Fig. 5), Sir uthiolar idee, Chenopidce, 

 Strombidce (Fig. 6). Proboscidifera holostomata. Fam. Scalaridce, rad. ooQco ; 

 Solaridce, rad. ooQoo ; Pyramidellidce, rad. 0; Eulimidce, rad. 0. Proboscidifera 

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



Fie. 7. Cassis suclosa (after Poli). a, Shell; &, beak; c, siphon; d, head; g, proboscis; e, 

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



Janthinidse, rad. ocO 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. Turbinellidce, 

 Fusidce, Mitridce, Buccinidce, Muricidce, Purpuridcc, Ifaliadca, Cancellariidce, 

 Volutidce, Olimdce, Marginellidce, Harpidce. Toxiglossa. Fam. Plcurotomidce. 

 Terebridce, Conidce. 



