Hutton. — New Species of Tertiary Shells. 333 



Art. LVI. — New Species of Tertiary Shells. 

 By Captain F. W. Hutton, F.G.S. 



[Read before the Philosophical Institute of Canterbury, 2nd July, 1885.] 



In this paper I give descriptions of a few more fossil shells. 

 The list of New Zealand tertiary mollusca now numbers about 

 460 species, of which about 250 still remain unfigured. 



Cylichna (Volvtjla) reflexa, n. s. 



Shell sub-cylindrical, mucronate posteriorly, smooth, a few 

 distant spiral lines at the anterior end. Aperture narrow, 

 rather effuse anteriorly, the inner lip being strongly reflected 

 over the columella. Length, 0*12 inch. 



Locality. White Bock Biver, South Canterbury. 



Murex espinosus, n. s. 



Shell fusiform, with a moderate canal and no spines. Whorls 

 5^ - 6£, the first embryonic, the others spirally and longitudinally 

 ribbed. Longitudinal ribs rounded, distant, 8 or 9 on a whorl ; 

 spiral ribs strong, scaly, close, about 10 on the penultimate, 

 and 25-30 on the body whorl ; those just below the suture 

 smaller than the others. Aperture oval, rather suddenly con- 

 tracted into the moderate and slightly bent canal, which is more 

 or less closed. Length, 1*2 inch ; breadth, 0-6 inch. 



Locality. Petane. 



Distinguished from M. octagonus by the complete absence of 

 spines. 



Nassa socialis. 



Nassa compta, Hutton, " Trans. N.Z. Inst," vol. ix., p. 296, pi. xvi., 

 fig. 9 ; not of Adams. 



Columbella angustata, n. s. 



Shell elongato-fusiform, spirally grooved, the spire longer 

 than the aperture. Whorls 6-7, flattened, the suture distinct; 

 spiral grooves narrow and rather distant, 7 on the penultimate, 

 and about 15 on the body whorl. Aperture elongately-oval, not 

 contracted in the middle; the outer lip thin (?) (broken). 

 Length, 0-43 ; breadth, 0-15 ; aperture, 0-2 inch. 



Locality. Petane. A single specimen. 



Pleurotoma plicatella, n. s. 

 Shell fusiform, the spire turreted, but not much larger than 

 the body whorl. Whorls 8£, the first 1| embryonic, the others 

 spirally striated. Spire whorls longitudinally ribbed below the 

 sinus area, and slightly so at the suture ; about 15-17 in a 

 whorl. The spiral striations extend over the whole surface, but 

 are reduced to two in the sinus area. On the body whorl the 



