;314 TROCHID^. 



tuberculate ; outer Up thickened and denticulated within, 6 sp. 

 Indo-Pacific. T. australis, Lam. (Ixxxi, 58). 



CRASPEDOTUS, Phil. (Otavia, Gray. Olivia, Cantraine. Danilia, 

 Brusina.) Shell subconoidal, not umbilicated ; whorls convex, 

 tuberculated in spiral series or cancellated ; columella twisted, 

 forming a false umbilicus and presenting a strong tooth entering 

 the aperture ; outer lip sillonated within, and having an external 

 varix. 2 sp. Mediterranean, N. Caledonia. 



EUCHELUS, Phil. (Aradasia, Grray.) Shell conoidal, turbinate, 

 umbilicated ; whorls rounded with granulated revolving ribs ; 

 columella lamellarly produced into a central tooth ; outer lip 

 thickened and crenulated within. Opercular whorls rather few, 

 rapidly increasing. 11 sp. Indo-Pacific. T. canaliculatus 

 (Ixxxi, 59). 



HUTTONIA, Kirk, 1882. Shell turbinated, subglobose ; perforate 

 or imperforate ; columella with a deep notch at the anterior end; 

 outer lip thickened and crenated internally. Distr. — 3 sp. New 

 Zealand. T. bella, Kirk. Distinguished from Euchelus by 

 having a deep notch instead of a small tooth on the front of the 

 columella. 



PERRiNiA, H. and A. Adams. Shell trochifoi'm, with flattened, 

 cancellated whorls ; aperture subquadrangular ; columella nearly 

 straight, with a few posterior tubercles ; outer lip subcrenulated 

 within. P. angulifera, Adams. 



CLANCULUS, Montfort. Shell conoidal or turbinated, not umbil- 

 icated ; whorls mostly granulous ; aperture contracted ; columella 

 spirally twisted, forming a false umbilicus, plicated throughout 

 and terminating in a multidentate varix ; outer lip dentated 

 within, with sometimes a larger superior tooth. 32 sp. Indo- 

 Pacific, Mediterranean. T. puniceus, Phil. (Ixxxi, 60'. 



CAMITIA, Gray. Shell depressed, polished, not umbilicated; 

 whorls rounded ; aperture transverse ; columella much twisted 

 and produced anteriorly into a lamella, ending in a tooth ; outer 

 lip smooth within. T. vitellinus, Gould (Ixxxi, 61). 



LEUCORHYNCHIA, Crossc. Shell perforated, polished, few- 

 whorled ; aperture rounded, not pearly ; basal margin callously 

 produced across the base of the shell beyond the umbilicus, but 

 without closing it. T. Galedonica^ Crosse (Ixxxi, 11). 



OXYSTELE, Philippi. Shell depressed conoidal, smooth, not 

 umbilicated ; umbilical region covered by a shining callous expan- 

 sion of the columella; columella flattened, curved anteriorly to 

 join the outer lip. 5 sp. Australian seas. T. vierula, Chemn. 

 (Ixxxi, 62). 



ATAPHRUS, Gabb. Shell form of Oxystele, but the columellar 

 lip antieriorly grooved, the groove terminating in a tubercle 

 above. Cretaceous ; North Carolina, California. T. Kerri, Gabb 

 (Ixxxi, 63). 



