> 
Fintay.—New Shells from New Zealand Tertiary Beds. 459 
comments on the short distance the varices are apart, as has already been 
done here in the case of C. kaiparaense. Tate also notes the “ obliquely 
costated posterior slope "; this is also a striking feature in the two species 
last described. 
C. revolutum and C. transenmum bear a resemblance to Plesiotriton 
dennanti Tate, the type of the genus Semitriton Cossmann, but as none of 
the specimens show the characteristic columellar plaits of that species they 
are not here referred to that genus 
Cymatium octoserratum n. sp. (Plate 48, figs. 6a, 6b.) 
Shell very кэм fusiform, whorls slightly askew but чайы otherwise 
regular, canal short. Protoconch as in Austrotriton maoriu about 
4 regularly-convex praes conical and symmetrical, with 3 faint equi- 
distant keels indicated at extremity, the true sculpture be eginning abrüptly 
and with a varix. Four adult whorls, lightly БОИ, below middle, but 
hardly interrupting the straight spire-outlines. Spire higher than aperture 
with canal. Spire-whorls with regular spiral cords, 5 on shoulder, 4 stronger 
ones below, strongest being on keel. On body-whorl every third cord 
below keel is much stronger, but after fourth strong cord (including 
All spirals finely granular, the granules being distant, blunt, and rounded. 
Eight axial ribs between every pair of varices, thin on shoulder, rapidly 
swelling out to greatest prominence on keel, where they form small but fairly 
sharp tubercles, strong between first an nd second main cords, almost at 
once dying away below this, but their Aie арчын marked by sharp prickles 
that serrate all main cords. Extremely dense and fine hair-like axial threads 
form the only secondary sculpture. Varices a about three-fifths of a whorl, 
not high, inconspicuous in front, deeply incised and rather abrupt behind, 
crossed by all sculpture except nodules, parallel to axial ribs. Aperture 
тые» эңе produced into a very short canal (about one-third 
of aperture in length) turned strongly to left and backwar 
e past varix, thickened and with 5 strong teeth within. 
Columella lightly concave, with 2 denticles anteriorly. Inner lip spread- 
ing out to thin sharp edge P columella and on parietal wall, with narrow 
plait some distance from outer lip. A tiny triangular umbilical chink 
between strong fasciole and inner lip. 
Height, 13 mm.; diameter, 7 mm.; height of aperture with canal, 
6 mm. (type). 
Type and eight others, from Target erdt in author's collection. Also 
of the Australian “ quoyi " group, being жы кашы, closest to that є Species 
itself and C. oligostirum (Tate). One of the paratypes has 10 intervariceal 
costae, and this brings it still closer to the Australian shells. 
—— n. d» - 
the writer's yrs ea is a fragment of a large new species from 
eee Southland (band 8a—Awamoan ?) It seems to be pene to 
С. spengleri (Chemnitz) and also to C. sculpturatum п. sp., but e the 
surface of the shell is everywhere abraded, so that the details of ог 
are obscured, it is best left undescribed. 
