Hurrox.—On new Land Shells. 189 
locomotive dise. Mantle subeentral just reflected over the peristome. Eye- 
peduncles separated at their bases, they and the tentacles long, stout, and 
cylindrical. Head, peduncles, and anterior part of the foot dark grey 
closely reticulated with blue-black lines, and with scattered minute white 
specks ; sole of the foot dark-coloured ; mantle under the shell pale yellow, 
with blotches of blue-black which show through the shell. Dentition, 18-0-18. 
Hab. Greymouth (Mr. R. Helms). 
When the animal is alive the peristome of the shell is yellow, but it soon 
fades. 
RHYTIDA CITRINA, Sp. nov. 
Shell depressed, umbilicated, malleated, thin, translucent, shining ; 
colour pale yellow, sometimes with a spiral brown band on the middle of 
the upper portion of the whorl. Spire very flatly convex, apex obtuse; 
whorls three, rapidly increasing, rounded; the first two whorls slightly 
longitudinally plaited, the last above with numerous small irregular inden- 
tations, below rounded, smooth, striated with growth-lines in the umbilicus ; 
suture impressed: umbilicus rather narrow : aperture oblique, broadly oval; 
peristome very thin (not adult?), with the columellar margin reflected. 
Greatest diameter 0°31, least 0.24; height 0.24; breadth of aperture 
0.16 inch. Animal pale brown, the upper surface with the peduncles and 
tentacles dark sooty black, with a pale band on the top of the head; sides 
of the foot marbled with sooty black. Dentition, 17—0—17. 
Hab. Greymouth (Mr. R. Helms). 
It is hardly possible that this shell can be the young of R. patula, 
because the markings on the shell, the colours of the animal, and the 
dentition all differ. 
HYTIDA AUSTRALIS, Sp. NOV. 
Shell depressed, umbilicated, rather thin, translucent, malleated ; colour 
pale horny-brown, the umbilicus darker, the first 24 whorls yellowish ; 
sometimes a pale spiral yellow band on the base. Spire flatly convex, 
obtuse ; whorls 8} rapidly increasing, rather flattened; above with nume- 
rous irregular shallow indentations sometimes arranged in oblique lines, 
the first 14 whorls smooth, the next obliquely plaited, the plaits gradually 
dying away but remaining longest at the suture; base rounded, smooth, 
shining, striated in the umbilicus with growth-lines; suture impressed : 
umbilicus rather narrow: aperture oblique, oval; peristome very slightly 
reflected over the umbilicus (not quite adult). Greatest diameter 0°43, 
least 0.83 ; height 0-25; breadth of aperture 0.2 inch. Dentition, 16-0-16. ——— 2 
Hab. Stewart Island (Mr. T. Kirk). - 
The shell can be distinguished from that of R. greenwoodi by the base : 
rounded. 
