Hurron.—On new Land Shells. 135 
large, rather oblique, subcircular, broader than high; peristome thin, 
regularly arched, the columellar margin slightly reflected. Greatest 
diameter 0:07, least 0-055; height 0°03 inch. 
Animal.—Body short, eye-peduncles long and thick, tentacles short ; 
mantle rather posterior, enclosed; foot narrow, without locomotive disc, 
pointed behind, not extending beyond the shell; no caudal gland. Colour 
pale grey, eye-peduncles and a stripe on each side of the head dark sooty- 
brown.  Dentition 1383-1-18. 
Hab. Eyreton, North Canterbury (Mr. C. Chilton), Christchurch (Mr. 
_ J. F. Armstrong). 
Genus Gerontia, g.n 
Animal heliciform ; mantle rather posterior, AE tail acute, with 
a mucous pore but no papilla. Jaw smooth, striated. Shell depressed, 
umbilicated, of about five gradually-increasing whorls; aperture oblique. 
This genus differs from Patula in having a mucous gland on the tail. 
GERONTIA PANTHERINA, Sp. nov. 
Shell subdiscoidal, broadly umbilicated, striated, horny brown. Spire 
slightly convex, whorls five, slowly increasing, rather flat, with rather close 
but irregular oblique strie, which are membranous on the upper surface, 
. interstices not reticulated ; suture impressed ; umbilicus more than one- 
fourth of the greatest diameter of the shell, perspective ; aperture oblique, 
rotund, slightly flattened below ; peristome thin, the margins rapidly con- 
verging ; columellar margin not reflected. 
Greatest diameter 0:37, least 0°33 ; height 0-16 inch. Teeth, 18-1-18. 
‘Animal. —Top of the head yellow; peduncles and a line on each side of 
the head black, rest of the body pale grey spotted with dark grey, the spots 
often collected into groups, a regular line of dark grey spots runs along each 
side, and they meet on the tail just over the mucous pore; below this line 
the side of the foot is marked with oblique dark stripes; sole white, the 
margin with grey spots. 
Hab. Greymouth (Mr. R. Helms). 
SrRoBILA LEIODUS, sp. NOV. 
Shell minute, subdiscoidal, umbilicated, ribbed; colour horny with 
longitudinal bands of pale rufous. Spire almost flat, but very slightly con- 
vex ; whorls five, very slowly increasing, rounded, with numerous oblique 
narrow ribs, about thirty in the tenth of an inch, the interstices finely 
striated with growth-lines; suture impressed: umbilicus rather narrow, 
about one-sixth the diameter of the shell, nearly cylindrical, margined with 
brown: aperture vertical, rather narrow, lunate; peristome simple, thin, 
the right lip at first ascending, then descending and sweeping forwards, 
leaving a shallow posterior sinus, afterwards regularly arched, columellar 
