6 



COM PA RA TIVE A NA TOM Y 



CHAP. VII 



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

 JYaticidcc (Fig. 98, p. 107), Lamellar idee. Rostrifera. Fam. Falvatidcc (fresh-water), 

 Ampullaridcc (fresh - water), Littorinidie, Cyclostomidce (terrestrial), Planaxidcc, 

 Hydrobiidcc (fresh-water), Aciculidcc (terrestrial), Truncatellidce (partly terrestrial), 

 Hipponycidcc, Capulidce, Calyptraeidcc, Pseudomelanidce, Melanidce, Cerithiidce, 



ll 



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

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



I ',, ,!!>/ id(c, Turritdlidcc., Xcnophoridcc (Fig. 5), Struthiolaridce, Clicnopidcv, 

 Strombidcc (Fig. 6). Proboscidifera holostomata. Fam. Scalar idee, rad. cr.0*> ; 

 Solaruhc, rad. ccO ; PymmideUidcc, rad. 0; Eulimidcc, rad. 0. Proboscidifera 

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



KII;. 7. Cassis suclosa (after Poll), a, Shell; /), beak; c, siphon; d, head; g, proboscis; c, 

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



Janthinidfe. rad. ccO . Heteropoda (marine Taenioglossa, with foot transformed 

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

 (Fig. 9). 



c. Stenoglossa. Xormal rad. 1.1.1. Rachiglossa. Fam. Tnrl!nclli<ln\ 

 Fusidce, Mitridcc, Suecinidce, J//' ;/</'/, Purpurida:, Haliadca, Canccllariidcc, 

 Volutidce, Olivida', MurgincUiihv, Harpidir. Toxiglossa. Fam. Pleurotomidae, 

 Tcrebridw, Conida:. 



