27 
gined. Sculpture: upper whorls with 2 revolving bands with series 
of uniformly strong subquadrate gemmulae leaving a median zone 
of the same width showing only axial ribiets (low and narrow) 
combining the gemmulae; their number in the last whorl 17. On 
the antepenultimate whorl an intermediate riblet appears forming 
tubercles on the axial costae and increasing in size distally, gem¬ 
mulae thus getting larger, but still remaining smaller than those 
of the bands, the upper of which becomes, finally, the broadest. 
Base with 2 thick entire revolving ridges, the upper one thinner 
proximally (on the parietal wall above the mouth). Colour reddish- 
brown, lighter towards apex and base; revolving bands (especially 
upper one) purplish-brown, gemmulae dirty white. Aperture sub¬ 
quadrate, narrowly canaliculate above, outer lip somewhat produced 
below, inner lip forming a small tooth when reflected on the upper 
basal ridge. Columella regularly sinuous, with a thick reflected lip, 
truncated below; canal very short, curved, with a notched end. 
Dimensions: H. 3, br. 1.2 mm. — Locality, North Island, 2, 2 
empty shells. 
From the known New Zealand species of the genus this form 
is well distinguished in shape and sculpture: on the upper part of 
the spire there are 2 distant gemmuliferous cinguli, further below 
there are 3. It seems to be most nearly related to Queensland 
species such as C. pinea Hedley 1909, p. 440, pi. XL., fig. 55). 
Cerithiopsis sarissa M u r d o c h. 
North Island: 1 la, 1 sp., h. 6. — Auckland Island: 43, 1 sp., h. 7. 
Cerithiopsis tvizonalis n. sp. 
(PI. I, fig. 17.) 
Shell small, turreted, whith straight outlines; whorls 11, plane, 
suture impressed, not deep. Sculpture: apical 1 1/2 whorls smooth, 
the subsequent whorl with dense somewhat flexuous axial costae; 
third whorl with 2 revolving ridges, the under one stronger; in the 
subsequent whorls coarser axial costae (their number 20—21 on 
the last whorl), knob-bearing in the Crossing points and ending 
above, below the sutures, with a series of tubercules non combined 
spirally; below, close above the suture, a fine simple thread, get¬ 
ting coarser on the last whorl and accompanied on the base by a 
