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Pete ee eS ee ee ee eee eS SY eee 
Hurron.—On some Pulmonate Mollusca. 151 
cusp as well as the median has a cutting point. No. 6 is intermediate 
between No. 7 and the laterals. Towards the margin the cusps get smaller 
and the cutting points larger, but the outer side cusp never has a cutting 
point. (Pl. III. fig. a.) The teeth are arranged in nearly straight trans- 
verse rows. (PI. IV., fig. .) ‘The specimen from which the drawings are 
taken came from Dunedin, but I have found the same species at Queens- 
town. There are 5-54 whorls, and the ribs are less than ‘01 inch apart ; 
the aperture is oblique. 
Parvna uypopota, Pfeiffer. The jaw is arcuate, not attenuated at the 
ends, which are rounded; it is transversely finely striated. It resembles 
the jaw of P. igniflua, (Pl. IIL., fig. m.) 
The radula is -02 inch in breadth, with about 183 transverse rows of 
teeth; the rows are nearly straight. (Pl. IV., fig. 4.) The teeth are 
26-1-26, of which 10 or 11 may be called laterals. The central tooth has 
& prominent median cusp, with two minute side cusps: the base of attach- 
ment is longer than broad, enlarging posteriorly, and extending far beyond 
the median cutting point. The laterals are bicuspid with a cutting point on 
each, the inner being the larger. No. 12 is also bicuspid, but the reflected 
portion and the cutting jpoints are very oblique. Towards the margin the 
cutting points increase to four. (Pl. IIL., fig. s.) 
This specimen is also from Dunedin, where the species is not uncommon. 
Some specimens are entirely ‘‘ horny-cinereous,” as in the typical P. hypo- 
polia, but some are slightly spotted, and others strongly spotted and marked 
With rufous, thus passing into P. iota. Both forms are sub-carinated. The 
Peculiarity of the jaw in this species and in P. igniflua, is no doubt sufli- 
cient to remove them from Patula; but in the absence of full information 
I make no attempt to place them properly, 
Parura IeniFLuUA, Reeve. The jaw is arcuate, with rounded ends, with 
distant transverse strie. Itis membranaceous, soft, and pale horn-coloured. 
There is no median projection. (Pl. IIL, fig. mu.) The striations of the 
jaw appear to arise from folds in the membrane; it gives the appearance of 
the jaw being made up of many pieces slightly imbricated, but I could not 
satisfy myself that they were really distinct. 
The radula is -03 inch in breadth, with about 70 nearly straight trans- 
verse rows of teeth. (Pl. IV., fig. 1.) The teeth are 87-1-87, with 11 
laterals on each side. The central tooth has a single cusp, surmounted by 
& cutting point ; the base of attachment projects beyond the cutting point. 
® laterals are bicuspid, but without a cutting point on the outer cusp. 
The inner marginals are also bicuspid, but the cutting point is longer. The 
Cuter marginals have the reflected part and the base of attachment much 
reduced, but the cutting points are very long and sharp. (PI. IIL, fig. c.) 
