474 



MOLLUSCA 



SUB-KINGDOM VI 



Gassidaria, Lam. (Morio, Montf. ; Galeodea, Link.), (Fig. 955). Shell ventricose, 

 not varicose. Canal long, twisted, reverted, or bent sidewise. Inner lip greatly 



expanded, outer lip 

 reflected, often 

 crenulate. Colu- 

 mellar border 

 plicate. Upper 

 Cretaceous to 

 Recent ; maximum 

 in Eocene. 



S u b - g e 11 11 s : 

 Sconsia, Gray (Fig. 

 956). Last whorl 

 with varix ; canal 

 short and straight. 

 Upper Cretaceous to 

 Recent. 



FIG. 955. 



Cassidaria carinata, 

 Lam. Calcaire Gros- 

 sier ; Grignori. 



FIG. 956. 



Cassidaria (Sconsia) 

 ambigua, Solander sp. 

 Oligocene ; Lattorf, 

 near Bernburg. 



Cassis saburon, Lain. Mio- 

 cene ; Gainfahrn, near Vienna. 



Cassis, Lam. 



(Fig. 957). Shell ovoid, ventricose, having irregular varices. Spire short, aperture 

 elongate. Outer lip thickened, reflected, usually denticulate in the interior. Inner 

 lip callous, expanded, denticulate, wrinkled, or granulate. 

 Canal very short, broad, sharply recurved, directed upward 

 posteriorly. Tertiary and Recent. 



Family 24. Doliidae. Adams. 



Shell thin, inflated. Spire very short, body whorl very large, 

 longitudinally ribbed or cancellated. Aperture wide, oval; 

 canal straight or curved. Operculum absent. Cretaceous to 

 Recent. 



Dolium, Lam. Spirally ribbed. Outer lip notched in- 

 ternally ; canal short, obliquely directed. Cretaceous to 

 Recent. 



Pyrula, Lain. (Ficula, Swainson), (Fig. 958). Spirally FlG> 958 



ribbed, grooved, or cancellated. Aperture very wide; outer py ru i a reticuiata,Lzm.*p. 



lip sharp ; canal Miocene; Gruud, near 



, j Vienna. 



long, broad, 



straight. Lower Cretaceous to Recent ; 

 maximum in Tertiary. 



Family 25. Tritonidae. Adams. 



Shell thick, ovate to fusiform, with 

 epidermis. Spire moderately high, whorls 

 varicose. Aperture with thickened outer 

 lip, and open, straight, or slightly bent 

 canal. Operculum horny, with marginal 

 nucleus. Cretaceous to Recent. 



Tritonium, Link. (Triton, Lotorium, 

 F - 960 - Montf.), (Fig. 959). Spire elongated. 



Ranella marginata, Brocchi, The varices do not run continuously 

 iocene ; Grund, near Vienna. ,, ,, , , r < -, -,-, 



over more than a few whorls. Columella 



and inner lip callous or granulated. Outer lip thickened internally and notched. 

 Cretaceous to Recent ; abundant in the Tertiary. 



FIG. 959. 



Oligocene ; Weinheiin, 

 near Alzey. 



