56 Transactions, — Zooloqy. 
entire length of the shell; peristome simple, the inner lip slightly reflexed, 
not covering the umbilicus ; columella plait small. Length :18 ; diameter 
'07; aperture, long *07, broad *05 inch. 
Hab. River Heathcote, Christchurch. 
Animal yellowish white, semi-trans] t. the head between the eyes 
and the centre of the rostrum yellowish brown. Foot emarginate in front; 
tentacles triangular, flattish, very short. Eyes triangular. 
Dentition 20-1-20, of which about 6 or 8 are laterals. Pl. xii., fig. 11. 
Central tooth quadrate, the length more than twice the breadth; 
reflected portion about two-fifths of the base. Inner laterals with the 
reflected portion deeply exeavated on the outer side, bicuspid, the inner 
eusp with its point being the larger; eutting points not reaching to the 
posterior margin of the base. Outer laterals with the reflected portion not 
excavated, the outer point small; the inner large, projecting beyond the 
base, often bidenticulate. Marginals normal. 
This species has the habit of leaving the water like L. truncatula, but 
from that species it differs in the shell, in the animal, and in the dentition. 
Limnza PUCILLA, sp.nov. PI. xii., fig. 5. : 
Shell small, oblong, glossy, translucent, finely longitudinally striated. 
Whorls 4, rounded, aperture oval, half the length of the shell; peristome 
simple, the inner lip reflexed, covering the umbilicus; columellar plait 
obsolete. Length -16; diameter 10; aperture -08 inch. 
Hab. Auckland. 
I have only seen two dead specimens of this species, and have not been 
able to examine the dentition. The shell somewhat resembles that of 
L. truncatula, but is, I think, quite distinct; and this is also the opinion of 
Professor A. P, Thomas, to whom I 
to describe them. 
ULINUS ANTIPODEUS, Sowerby in Reeve's Conch. Icon., Physa, f. 37 
(1878). : 
Hab. In lakes from Auckland to Otago. This is our largest species ; 
the whorls are never keeled. The animal and dentition are unknown. 
Apparently allied to P, auriculata, Gassies, from New Caledonia. 
BULINUS VARIABILIS, Gray in Dieffenbach’s New Zealand, ii., p. 248 
(1843). Bulinus gibbosus, Hutton, Trans. N.Z. Inst., xiv., p. 155, pl. iv., f. 
c., 9. and v. (not of Gould). Physa nove-zealandie, Sowb. Conch. Icon., 
f. 29 (1884). Physa guyonensis, Tenison-Woods, Pro. Lin. Soc. of 
N.S.W., iii., p. 188, pl. 13, f. 4. (1878). 
Hab. "Throughout New Zealand. 
This species is smaller than the last. The whorls are rounded, but 
sometimes show traces of a keel. The shell is figured in pl. xii., f. 7, the 
dentition in Trans. N.Z. Inst., vol. xiv., pl. 4, 
showed the specimens before venturing 
