20 GASTEROPODA. 



COLUMBELLA. 



Spire rather produced; aperture generally restricted iu tlie middle 

 by a swelling on the outer lip ; columella excavated. 

 Sub- tropical. 



* 67. C. zebra, Gray. Shell oblong, somewhat'pyramidal, smooth, 

 fulvous, conspicuously striped longitudinally with chestnut ; aperture 

 rather broad, lip slightly thickened within, faintly denticulated. 

 (Reeve.) 



68. C. (Atilia) rubigiELOSa, sp. nov. "Fusiform, smooth, whorls 

 transversely plicated ; spire elevated, acute ; aperture rather broad ; 

 outer lip thin ; not swollen ; columella with four oblique teeth ; pink 

 or brownish pink. Length, '3; breadth, '15. 



Chatham Islands only. 



FAMILY CASSIDIJS. 



Sub-globular, spire short ; aperture with a recurved canal ; oper- 

 culum ovate or oblong, annular, nucleus elongate in the middle of the 

 inner side. 



CASSIS. 



Last whorl large, aperture linear, long, with a short sharply re- 

 curved sinistral canal in front ; inner lip forming a large transversely 

 wrinkled plate ; outer lip thickened, reflected, plicate or toothed. 



Tropical and warm seas. 



69. C. pyriim, LamarJc, I.e., x.,|). 33 ; C. zei/lanica, Lam., I.e., x., 

 p. 33. Shell ovate, ventricose ; whorls obtusely angled, nodulose on 

 the angles ; upper whorls finely striated ; aperture dilated ; columella 

 smooth, with a large plait at the anterior end; outer lip reflexed, 

 smooth. Pinkish white, with bands of chestnut brown wavy spots ; 

 outer edge of lip banded with purplish brown. Length, 3'25 ; breadth, 

 2-25 ; angle of spire, 102. 



Australia. Ceylon. 



70. C. adiatilia, Lamark, I.e., x. ; p. 33. Ovato-acute, veutri- 

 cose ; whorls flattened, smooth ; aperture moderate ; columella smooth, 

 with a lew plaits at the anterior end ; outer lip smooth. Purplish 

 brown, spirally variegated with lighter and darker; interior pale 

 purple. Length, 1'5 ; breadth, 1 ; angle of spire, 85. 



Omaha (not full grown). Australia. Cape of Grood Hope. 



FAMILY DOLIID^. 

 Shell thin, sub-globose ; spire short ; operculum none. 



DOLIUM. 



Shell ventricose, spirally grooved ; last whoii very large ; outer lip 

 waved. 



Tropical and warm seas. 



71. D. Variegatum, Lamarlt, l.c , x., p. 143. Grooves simple, 

 without any elevated line ; columella smooth, perforated ; suture ex- 



