188 DE. C. T. TRECHMAJN-JS^ Olf [vol. Ixxiii^ 



south of the Wau'oa Gorge (ISTelson), ^vhere fragments, often of 

 large specimens, are not rare. It is also found at Nugget Point. 

 Carnic. 



The holot3'-pe is a mould belonging to the Geological Survey 

 Collection, and comes from Mount Heslington. After preparing it, 

 I was able to make a gutta-percha squeeze (fig. 4). The Survey 

 also possesses a poorly-preserved fragment, consisting of several 

 whorls, of a specimen from Nugget Point, which must have 

 measured nearly a foot in length. I have several fragments from 

 Mount Heslington. 



Remarks. — This handsome shell seems to agree gen erica Uy with 

 Koken's genus Corojiaricf, of which several species occur in the- 

 Hallstatt Limestone. The genus resembles in some wa3"s the 

 Zygo'pleiira group of the Loxonematidse. 



BorEarETiA(?) aeata, sp. nov. (PL XVIII, fig. 3.) 



This shell consists of six or seven whorls, which increase rather 

 rapidly in size ; the body-whorl is large and rounded, and occupies 

 rather more than half the length of the shell. The sutures are 

 rather deep, and the whorls form a narrow ]Dlatform below them. 

 The decoration consists of spiral, rounded, parallel, raised, equidistant 

 ridges, between which are furrows of about the same width as the 

 ridges. There are about fifteen ridges on the body-whorl. A 

 shallow umbilicus seems to be present, but the shape of the aperture 

 could not be seen. Height= 32 mm. ; width of body-whorl= 24 mm. 



Localit}^ and horizon. — Mount Heslmgton (Nelson). The 

 holotype from which I made a gutta-percha impression belongs, 

 together with several fragments from the same locality, to the 

 Geological Survey Collection. . I found a cast of a smaller spe- 

 cimen, 20 mm. high, in hard greywacke at Nugget Point. Carnic. 



Eemarks. — Owing to the poor state of preservation of the 

 material, the generic position of this shell cannot be determined 

 with certainty, and its attribution to JBourguetia is somewhat 

 conjectural. 



DENTALirM sp. (PI. XVIII, fig. 2.) 



Length =originally about 37 mm. Greatest breadth=7 mm. at 

 the anterior end ; the posterior end is missing. The shell is gentl}^ 

 curved : it is oval in section at the anterior, and nearly circular 

 towards the posterior, end. The shell is rather thick, smooth, and 

 ivory-like, with fine concentric growth-lines. The edge of the 

 aperture is sharp and oblique, the margin being high and convex on 

 the concave side, and concave on the ventral or convex side of the 

 shell. The surface towards the aperture is rounded on the concave, 

 flatter on the convex side. The growth-lines correspond to the 

 obliquity of the aperture. 



Locality and horizon. — Bed c, Otamita (Hokonui Hills).. 

 Carnic. 



