FiNLAY.—New- Zealand Tertiary Rissoids. 489 
Epigrus fossilis n. sp. (Fig. 10.) 
ll 
lost. Whorls very slightly convex, long in proportion to width, loosely 
coiled, regularly rounded and not shouldered, base convex. No sculpture 
except fine flexuous and rather conspicuous growth-lines. Spire elongate- 
tur ; 
Height, at least 1-8 mm. : diameter, 0-75 mm. ; height of aperture, 0-7 mm. 
Holytype, from Pukeuri, in the author's collection. 
The material consists of a single fragmentary specimen, but as the species 
is evidently rare, and the genus has not previously been recorded from New 
Zealand, it has been described. The Recent E. dissimilis (Wats.) and 
E. verconis (Tate) of Australia seem to be related forms. 
Rissoina perplexa n. sp. (Fig. 11.) 
Shell minute, rather short, stout, almost imperforate, opaque, but slightly 
shining. Protoconch of about 2 convex whorls, a minu i 
sculpture absent except for faint swelling margining suture above, and 
fairly strong, blunt angulation at upper three-quarters of whorls; between 
is a small concave shoulder. Spire bluntly conical, about li times 
impressed. 
to bac 
considerably thickened on upper part of outer lip, though not much 
elsewh A strong basal channel, marked by a semicircular curve in 
i lso a distinct posterior notch in outer lip. Inner lip not much 
Height, 2-1 mm.; diameter, 1 mm. ; height of aperture, 0-8 mm. 
Holotype (unique), from Clifden, Southland (horizon 6, of Park*), in 
the author's collection. 
* J. PARK, Geology and Mineral Resources of Western Southland, N.Z. Geol, Surv. 
Bull, No. 23 (n.s.), p. 52, 1921. 
