Hutton. — On some Freshwater Shells of New Zealand. 65 



Limn^ja (Amphipeplea ?) ampulla, sp. nov. PI. 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 

 3^, 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 (pi. 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 

 (Mull.) it differs in wanting the spiral striae on the shell, and considerably 

 in the dentition. 



Limn-ea leptosoma, sp. nov. PI. xii., fig. 3. 



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 indications of darker spiral bands near the 

 mouth. Whorls 4, rather flattened ; suture deep. Aperture ovate, occupy- 

 ing two-thh'ds of the length of the shell ; outer lip thin and straight, inner 

 lip callously reflexed over the body whorl, and completely covering the 

 umbilicus. Columella plait not very distinct. Length *47 ; breadth *27 ; 

 aperture, long -34, broad *20 inch. 



Hab. Wellington. 



I have two specimens only. The animal and dentition are unknown. 



Limnjsa tomentosa, Pfeiffer. Pro. Zool. Soc. of London, 1854, p. 297 

 (Succinea) ; Keeve, Conch. Icon., Succinea, f. 81. 



Hab. Auckland (Mr. Justice Gillies). 



Dentition (pi. 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. 



LlMNiEA TENELLA, Sp. nOV. PI. xii., fig. 4. 



Shell small, oblong, not glossy, longitudinally striated, olive horny. 

 "Whorls 4, rather flattened, apex blunt. Aperture ovate, less than half the 



