184 Transactions.— Zoology. 
Art. VIII.— Descriptions of new Land Shells. By Professor F. W. Hurton. 
[Read before the Philosophical Institute of Canterbury, 19th October, 1882.] 
Durme the last six months I have received many land shells from several 
friends, but especially from Mr. T. F. Cheeseman of Auckland and Mr. R. 
Helms of Greymouth, and amongst these shells are the following new 
species. The most interesting are a species of Strobila, a genus hitherto, 
I believe, known only in America and the West Indies, and two species of 
Leptopoma, a genus of operculated land shells that occurs in New Guinea, 
Borneo, and the Philippine Islands, but not hitherto recorded from New 
Zealand. 
The dentition of these new species, together with others already de- 
scribed, will form the subject of another paper which I hope to read to the 
society next year. 
Sec. AULACOGNATHA. 
PATULA TAPIRINA, sp. nov. P. coma, Hutton, Trans. N.Z. Inst., xiv., 
p. 180, pl. 8, fig. L (not of Gray). I 
Shell subdiscoidal, broadly umbilicated, closely ribbed ; colour horny- 
brown, sub-radiated with reddish spots. Spire very slightly elevated, flat : 
whorls 54-6, slowly increasing, rounded, ornamented with narrow oblique 
ribs, about 16-20 in the tenth of an inch, the interstices indistinetly striated 
with growth-lines; suture impressed: umbilicus about one-fourth the dia- 
meter of the shell, funnel-shaped, gradated, pervious: aperture subvertical, 
rotundly lunar; peristome thin, upper margin rapidly advancing and then 
turning down with a slightly concave sinuation, then regularly arched; 
columellar margin not reflected. Greatest diameter 0-19, least 0:16, height 
0-07 inch. Dentition, 18-1-13. 
Hab. Dunedin. 
Having compared this species with specimens of the true P. coma from 
Auckland I find that it is different, being more closely ribbed, but less 
closely so than in P. buccinella and P. infecta. The right lip advances, as 
in P. infecta, but it can be distinguished from that species by the interstices 
between the ribs appearing almost smooth when viewed by transmitted 
light, and an inch objective. 
Micropuysa (?) pura, sp. nov. 
Shell minute, subdiscoidal, umbilicated, thin, translucent, smooth, 
searcely shining, with distant plait-like ribs: colour horny-brown. Spire 
slightly eonvex ; whorls 4, increasing rather rapidly, rounded, with regular, 
distant, membranous ribs, about 20 to 25 in the tenth of an inch, the 
insterstices finely reticulated; suture impressed ; umbilicus rather large, 
> 
about one-fourth the diameter of the shell, gradated, pervious; aperture 
