Hurron.—On some Freshwater Shells of New Zealand. 55 
Linea (AMPHIPEPLEA ?) AMPULLA, Sp. NOV. Pl. xii., fig. 2. 
Shell ovate, very thin and fragile, semi-transparent, slightly longitu- 
dinally plaited, without any spiral lines, yellowish horn-colour or greenish, 
rarely with a white spiral band on the centre of the body whorl. Whorls 
8}, the last swollen ; spire acute, short, about one-fifth of the length of the 
whole shell; suture rather deep. Aperture oval, the outer lip thin, not 
reflected ; inner lip broadly reflected and thickened on the columella, but 
not covering the umbilicus; columella plait well marked. Length °4; 
breadth -27; aperture, long :28, broad +17 inch. 
Hab. Arthur’s Pass (Mr. Dominick Brown and Mr. Cheeseman); Lake 
Lyndon (Mr. J. D. Enys). 
Dentition (pl. xii., fig. 8), 28-1-28, of which about 9 are laterals. 
Central tooth broader behind, the sides concave ; reflexed portion moderate 
with a well marked point. Laterals with the reflexed portion oval, nearly 
as large as the base, with a trifid cutting point projecting over the next 
row of teeth; marginals normal. 
This species appears to be near L. huonensis (Tenison-Woods) from 
Tasmania, but the dentition of that species is not known. From L. peregra 
(Müll.) it differs in wanting the spiral striæ on the shell, and considerably 
in the dentition. 
LIMNÆA nEPTOSOMA, sp.nov. PI. xii., fig. 8. 
Shell ovate, acuminate above, glossy, rather strongly longitudinally 
striated, and with four or five obsolete distant spiral ridges on the body 
. whorl: pale horny white with indieations of darker spiral bands near the 
mouth. Whorls 4, rather flattened; suture deep. Aperture ovate, occupy- 
ing two-thirds of the length of the shell; outer lip thin and straight, inner 
lip eallously reflexed over the body whorl, and completely covering the 
umbilicus. Columella plait not very distinct. Length 47; breadth :27; 
aperture, long 84, broad :20 inch. 
Hab. Wellington. 
I have two specimens only. The animal and dentition are unknown. 
Luma TOMENTOSA, Pfeiffer. Pro. Zool. Soc. of London, 1854, p. 297 
(Succinea) ; Reeve, Conch. Icon., Succinea, f. 81. 
Hab. Auckland (Mr. Justice Gillies). 
Dentition (pl. xii., fig. 9). Central tooth broader behind, length nearly 
three times the breadth, the reflexed portion small. Laterals rather broad, 
the reflexed portion not half the length of the base, hollowed on the outer 
side, bicuspid, with two nearly equal cutting points. 
IMNJEA TENELLA, sp.nov. Pl. xii., fig. 4. 
Shell small, oblong, not glossy, longitudinally striated, olive horny. 
Whorls 4, rather flattened, apex blunt. Aperture ovate, less than half the 
