820 Transactions. — Geology. 



Odostomia (Pyramis) fasciata. 



Shell minute, ovato-elongated, faintly spirally striated. Whorls 5, the 

 first rounded and polished, the rest flattened ; those of the spire with three 

 shallow spiral grooves at the posterior end, a broad smooth band in the 

 centre and a single spiral groove at the anterior end. Body whorl with 

 numerous spiral grooves hi front of the smooth band. Suture impressed. 

 Aperture ovate ; columella with a single nearly obsolete fold ; umbilicus 

 open. 



Length, -14 inch. 



Locality. Wanganui. 



Cancellaria lacunosa. 



Shell ovato-fusiform, not umbilicated, the spire produced. Whorls 6, 

 the first two embryonic ; the others rounded, spirally ribbed and longitu- 

 dinally plicated. Spiral ribs three on the spire whorls, and seven or eight 

 on the body whorl, with fine spiral threads between them. Longitudinal 

 plications numerous and rather oblique, about 15 in a whorl. Aperture 

 broadly ovate ; columella with three strong folds ; no anterior notch ; outer 

 lip acute. 



Length, '43 inch ; breadth, *36 inch. 



Locality. Petane. 



Admete (?) ambigua. PI. xviii., fig. 18. 



Shell minute, ovate, perforated, spirally striated. Whorls 4, the first 

 two smooth, the others rather convex, spirally grooved, about 18 or 20 

 grooves on the body whorl. Suture well marked. Aperture ovate, more 

 than half the length of the shell ; columella smooth, rather produced in 

 front, not covering the umbilicus. 



Length, -08 inch. 



Locality. Wanganui. 



Turritella (Eglisia) planostoma. PI. xviii., fig. 19. 



Shell minute, turreted. Whorls 8 or 9, flattened, the anterior portion 

 concave, smooth. Spire whorls with four strong, equal, spiral ribs. Body 

 whorl with five or six spiral ribs and a smooth base. Suture well marked. 

 Aperture ovate, flattened anteriorly, and the outer lip rather straight. 



Length, *2 inch. 



Locality. Wanganui and Petane. 



Rissoa emarginata. PI. xviii., fig. 20. 



Shell minute, ovato-conical, smooth, polished, very delicately spirally 

 striated. Whorls 6, flattened, the two first very small and smooth. Suture 

 obscure. Aperture ovate, the peristome continuous ; slightly notched an- 

 teriorly. 



Length, "08 inch, 



