322 Transactions, — Geology. 



Length, *3 inch (?, specimen broken) ; breadth, *12 inch. 



Locality. Petane. 



Scalaria corulwn. PI. xviii., fig. 22. 



Shell minute, ovate, slightly perforated. Whorls 5, very convex, the 

 two first smooth, the others longitudinally ribbed; about 22 to 24 ribs in a 

 whorl; the interstices finely spirally lined ; suture deep ; body whorl rounded. 

 Aperture roundly ovate, the peritreme continuous. 



Length, -06 inch. 



Locality. Wanganui. 



Zizyphinus ponder osus. 



Shell large, solid. Whorls 5 or 6, flattened, the periphery roundly 

 angled ; with distant smooth spiral ribs, which are closer together on the 

 posterior part of the whorls ; suture distinct ; base with about 12 fine spiral 

 ribs. Aperture rhomboidal, the umbilical callus large. 



Length, 1*4 inch; breadth, 1*7 inch. 



Locality. Wanganui. 



Differs from Z. decarinatus by the periphery being more rounded, the 

 base not so flattened, and the umbilical callus larger, as well as in the 

 whole shell being much thicker. 



Hemimactra crassa. 



Shell trigonal, sometimes nearly as high as long, massive, inequilateral, 

 rather rudely concentrically striated. Anterior dorsal margin straight, or 

 slightly concave ; posterior dorsal margin slightly convex, larger than the 

 anterior margin, the posterior slope barely keeled ; ventral margin curved. 

 Left valve with a single strong elongated lateral tooth on each side. Eight 

 valve (?). Pallial sinus very shallow and rounded. 



Length, 1/6 inch ; height, 1*4 inch. 



Locality. Wanganui. 



Tellina angalata. 



Shell ovato-trigonal, transverse, compressed, inequilateral, anterior end 

 longer, regularly concentrically grooved. Posterior end truncated, and with . 

 a well marked fold on the left valve. Anterior dorsal margin convex, the 

 posterior dorsal margin slightly concave, ventral margin rounded in front 

 and flattened behind. Eight valve with two cardinals, the anterior bifid. 

 Left valve with two cardinals, the posterior bifid. Posterior laterals obsolete. 



Length, 1-3 inch; height, -85 inch; thickness, -35 inch. 



Locality. Wanganui. 



Tellina retiaria. 



Shell ovato-trigonal, compressed, sub-equilateral, the anterior end shorter, 

 finely and rather distantly concentrically lamellated, and decussated with 

 radiating lines. Posterior fold obsolete, Anterior dorsal margin slightly 



