Hurrox,—On some Freshwater Shells of New Zealand. 57 
Buuinvus rABULATUS, Gould, U.S. Explo. Expedition, xii., p. 116, f. 180 
(1848) ; Sow. Conch. Icon., Physa, f. 17. 
Hab. Bay of Islands in mountain streams. Whorls flattened above, 
but the angle rounded. I have not seen this species, unless it is the same 
as the last. The dentition is unknown. 
BULINUS MSTA, Adams, Pro. Zool. Soc., 1861, p. 144; Sowb. Conch. 
Icon., Physa, f. 82. Physa lirata, Tenison-Woods, Pro. Lin. Soc. of 
N.S.W., iii., p. 198, pl. 13, f. 6 (1878), not of Tristram. 
Hab. "Throughout New Zealand. 
Distinguished by the angular shoulder to the shell. 
. Dentition, 80—1—80, of which 6 or 8 are laterals. Pl. xii., f. 12. 
Central tooth broader behind, the length about the same as the breadth ; 
reflected portion eovering more than half the base, and carrying two small 
eutting points. Inner laterals with three moderately large cutting points, 
the inner one of which is bidenticulate at the point; outer laterals with 
the inner cutting point broad and with three denticles at the apex. 
Marginals normal. 
Prawonnis comiNNA, Gray (1849). Pl. xii., fig. 6. Reeve, Conch. Icon., 
Planorbis, f. 122. 
Hab. Auckland, Christchurch, Lake Wakatipu. 
Animal semitransparent; greyish, minutely speckled with smoke brown. 
Foot short, tapering posteriorly, rounded behind and in front. Rostrum 
emarginate. Tentacles cylindrical, rounded at the tip, widely separated at 
the base. Eyes large, round, situated at the inner bases of the tentacles. 
The steeth are arranged in broken transverse bands, but they are too 
minute to be made out with a 4th objective. There appear to be eleven 
laterals and a large number of marginals on each side, the difference 
between the two being well marked. 
The following species has been introduced :— 
LIMNÆA sTAGNALIS, Linné, 
Hab. River Avon, Christchurch. 
Introduced intentionally as food for trout. 
The following are omitted as not really inhabiting New Zealand :— 
Limnea wilsoni, Tryon (1866). 
Like Physa pyramidata, Sowb., from Australia. 
Physa gibbosa, Gould (1847). 
Inhabits New South Wales. 
Physa cumingi, Adams (1861). 
Inhabits Queensland, 
