DESCRIPTIONS OF SOME NEW FORMS OF HELICOID LAND-SHELLS. 
By G. K. Gunz, F.Z.8., ete. 
Read 14th November, 1902. 
PLATE VII. 
Some of the shells forming the subject of the present paper have 
been in the British Museum, in the collections of Mr. Ponsonby and 
Mr. Da Costa, or in my own possession, for several years; and although 
the fact of their being undescribed has never been disputed, I have 
hitherto hesitated to deal with them, hoping that some one more 
competent would do so. 
1. Lasyrinraus Barri, Dautz., var. prmrNvuTa, var. nov. 
Pl. VII, Figs. 1-4. 
Differs from the type described by Dautzenberg! by its smaller size. 
In the characters of the aperture and peristome it agrees closely with 
the type. 
Diam. maj. 27, min. 23 mm.; alt. 11 mm. 
Hab.—Perené, Peru. Altitude 900 metres. 
Diam. maj. 24°5, min. 21 mm.; alt. 11°5 mm. 
Hab.—Sagarmo, Peru. Altitude 1,000 metres. 
Two specimens received from Mr. W. F. H. Rosenberg in 1899. 
This habitat is considerably farther south than that of the type. 
2. Tersites (Bapistes) MERIDIONALIS, n.sp. Pl. VII, Figs. 5-7. 
Shell narrowly umbilicated, sublenticular, finely striated, whitish 
with 8 pale buff bands; the first subsutural, sharply defined; the 
other two more or less diffused, one above and one below the 
periphery; the base becomes pale brown towards the umbilicus. 
Spire depressed, suture margined, apex obtuse. Whorls 5, flattened 
above, increasing regularly ; the last acutely keeled at first, becoming 
rounded and dilated towards the mouth, tumid below, not descending 
anteriorly. The first four whorls are finely eranulated; the last shows 
a few traces of spiral lines above, but below the periphery it is 
ornamented with distinct wavy incised spirals. Aperture oblique, 
subovate ; margins subparallel; peristome white, thickened and 
reflexed, columellar margin dilated, partly covering the narrow but 
deep umbilicus. 
Diam. maj. 28, min, 23°5 mm.; alt. 16°56 mm. 
”? ? zy 9 22 ” ”) 14 »» 
Hab.—South Australia. 
Type in my collection. 
1 Journ. de Conchyl., tom. xlix (1901), p. 806, pl. ix, figs. 1-3. 
