Fintay.—New Shells from New Zealand Tertiary Beds. 461 
almost disappear so that anterior half of зае areas is lightly convex 
and smooth except for spiral sculpture. This forms regular, distant, fine 
and granulate cords over the whole surface, a icem cord being deme d 
followed by 1-3 weaker threadlets; the number of main cords is di 
to estimate, but there are about 10 on shoulder and below aso on 
Secondary sculpture characteristic, most prominent near periphery, sur- 
face being vate cut up by wire-netting-like grooves into a shagreened 
aspect like a reptilian skin. Apart from more or less distinct growth-lines, 
greater pus of und has no axial sculpture, nodules being confined to 
periphery. Varices not quite in line on alternate whorls, lower ones being 
whorl, рта gently sloping behind, descending more steeply in front to 
p edge, hardly С from level of Mean Where surface 
of shell à is UA preserved the combined forms of sculpture give it a satin- 
like texture and gloss; outer ee especially inner lip highly polished. Spire 
considerably higher than aperture with canal. Suture impressed, very 
v ure relatively rather small, with very thick walls, shghtly 
uneven. 
oblique, ovate, channelled above, produced below into short narrow, but 
strong recurved canal. Outer lip expanded, especially below, 7 or 8 heavy 
denticles within, lowest two adjacent; columella much excavated, with 
out 7 thick ridges extending over most of its length in juvenile shells, 
but with 4 or 5 thick, low, and close elongate tubercles at base in adults. 
Inner lip extending some distance past columella with definite boundary, 
but forming no false umbilicus; very heavy parietal tubercle at junction 
with outer lip, but otherwise no plaits or wrinkles 
Height, 54 mm.; diameter, 25 mm. ; height of aperture with canal, 
25 mm. (type). ае ‘dimensions of a paratype, 53 mm., 23 mm., 
23 mm. . 
Type, and one adult and two juvenile paratypes, from Clifden, South- 
land нв, 6a—Ototaran ?), in author's сое 
osely related to C. neozelanica (M. & M.) from UM Gully, but м 
Ше ed by its more slender shape (diameter less than half heigh 
instead of OR) relatively much smaller De and, judging from e 
pps finer spirals and granules. Except for these points the diagnosis of 
. neozelanica given by Marshall and Murdoch exactly fits А. clifdenesis, 
so that the Target Gully shell is evidently a descendant of the new пн, 
That these shells belong to Charonia and not to Austrotriton is shown 
by their low and wide оаа rices and characteristic columellar е 
tion when juvenile, the numerous саа plaits over almost all the 
columella being well shown by juveniles of C. lampas (L.). Distorted 
Austrotriton, and, though it is almost impossible to draw the line of separa- 
tion between various genera of this difficult family, the two shells here treated 
are far more in accord with Charonia than with Cymatium (s. str.) or Austro- 
triton. C. ovoidea (Tate), the Australian Tertiary member of this genus, 
has little resemblance to the New Zealand species. 
Two other fossil species of Cymatium have been described from New 
Zealand, and, to complete this account of the family, notes on these and on 
some Recent species are appended, and, finally, a key to all our species is 
given. 
