Sutton. — On neiv Tertiary Shells. 327 



Nassa (Tritiaria) cingulata. 



Shell elongato-ovate, the spire produced, acute. "Whorls 7-|, the first 

 two embryonic, the others rounded, spirally and longitudinally ribbed ; 

 about 6 spiral ribs on the spire whorls and 12-14 on the body whorl ; about 

 18 longitudinal ribs on a whorl : some of the spiral ribs are double. Aper- 

 ture ovate ; a small posterior sinus ; anterior canal very short and re- 

 curved ; columella and right lip smooth ; callus on inner lip small but 

 defined. 



Length, T05 inch ; breadth, '47 inch. Aperture, *42 inch. 



Locality. Greta, Canterbury. 



Perhaps a Cominella. 



Cominella monilifera. 



Shell small, ovate, the spire rather short. Whorls 5-6, the first two 

 embryonic, the others longitudinally and spirally ribbed ; about 14 longitu- 

 dinal low ribs on the body whorl, the intervals as broad as the ribs ; 11-12 

 spiral ribs on the body whorl, close, making the longitudinal ribs nodulose ; 

 posterior portion of the whorls concave, covering the suture. Aperture 

 ovate, the posterior canal strongly marked ; anterior canal quite short ; 

 outer lip thickened, toothed inside. 



Length, -68 inch ; breadth, -44 inch. 



Locality. Shepherd's Hut, Waipara. 



Terebra biplesc. 



Shell turreted ; whorls 9 or 10, flattened, longitudinally ribbed ; ribs 13 

 in a whorl, sharp, straight or slightly curved, usually higher at each end 

 than in the middle, especially on the anterior whorls of the shell ; on the 

 body whorl they end suddenly at the shoulder. Aperture oval ; a posterior 

 sinus apparent ; anterior canal short, not much twisted. 



Length, *7 inch ; breadth, '2 inch. 



Locality. Pareora. 



Differs from other New Zealand species in the shouldered whorls and 

 peculiar ribs. 



Clathurella cincta. 



Shell fusiform, the spire produced and acute. Whorls 7-8, rounded, the 

 first two smooth, the others longitudinally plicated and spirally ribbed ; 

 plications low, about 10 in a whorl ; spiral ribs strong, distant, narrow, 5 

 on the penultimate whorl, of which the two posterior are smaller. On the 

 body whorl there are 16-18, some of which are alternately larger and 

 smaller ; suture well marked. Aperture ovate, produced into a short an- 

 terior canal. 



Length, '35 inch ; breadth, -15 inch. 



Locality. White Eock Eiver. 



