Fintay.—New Zealand Tertiary Rissoids. 483 
Haurakia oamarutica n. sp. (Fig. 2.) 
Shell small, oval, imperforate, axially costate. Protoconch of 14 smooth 
globose whorls, pullus large. Shell-whorls about 3, convex, body-whorl 
30 on body-whorl, fading out on base ; interstices generally a little wider 
than ribs and bearing fine spiral striae. A varix marks outer lip. 
spirals and axials often quite worn off. le rci" higher than aperture, 
outlines almost con Suture well impre Aperture ovate, angled 
above. Peristome continuous, slightly н basal lip s omewhat 
expanded. Columella arcuate, hardly expanded. Umbilical area with a 
small narrow impression. 
Height, 1-4mm.; diameter, 0-8 mm.; height of aperture, 
0-5 mm 
Largest атш Height, 1-9 mm.; diameter, 1-1 mm.; height of 
aperture, 0-7 mm 
Type and many paratypes, from Target Gully, in the author's collection. 
Very close to Н. huttoni (Sut.) but — by its thinner and 
irregular ribs si spirally-striate interstices, and its constantly much 
smaller size. The figure shows the shell in a sloping position, hence the 
spire is somewhat foreshortened. 
. Linemera n. gens 
Shell superficially similar to Merelina—i.e., with clathrate mop 
but protoconch adpressed, smooth, on and dome-shaped, wi incon- 
spicuous sutures, instead of being gh get spi dul, an 
grooved, 
paucispiral, with deep sutures, as in Merelina. ^ Apertnre with thin edge, 
sometimes thickened behind with simple varix, without a second projecting 
rim inside, rather effuse hs base. Chink-like umbilicus generally present. 
Type, L. interrupta n nov. (Rissoa gradata Hutt.; Philippi's usage 
of the same name for ёк Kelian fossil las many years’ ' priority). 
Iredale already indicated the presence of this group in Australian 
М ы йө, p . 448); here undoubtedly belong Rissoa filocincta Hedley 
and P Мены sculptilis un and perhaps Alvania thouinensis 
ul tte 
which have similar lirate embryos. Rissoa pingue Webster is the only 
Recent representative of Linemera in New Zealand. 
Linemera minuta n. sp. (Fig. 3.) 
Shell minute, oval, clathrate, imperforate. Protoconch of 2 globo 
glossy whorls, nucleus minute, rapidly enlarging. Shell-whorls about 
2, indistin tinetly ій just below suture, then flatly convex; body- 
whorl bluntly angled, base almost flat. Axial sculpture commencing first, 
consisting of ne bluntly-rounded ribs, sloping weis rds and reaching 
from suture to suture, interstices narrower; they number about 19, and 
cease just below line of suture on body-whorl. Жар erossed by much 
weaker spirals, indistinct on early whorls, 4 on penultimate whorl, broad 
and flatly rounded (interstices a and cutting up axials into blunt 
16* 
