Hutton. — On new Land Shells. 189 



locomotive disc. Mantle subcentral just reflected over the peristome. Eye. 

 pedimcles 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. E. Helms). 



When the animal is alive the peristome of the shell is yellow, but it soon 

 fades. 



Ehytida 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. E. 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. 



Ehytida australis, sp. nov. 



Shell depressed, umbilicated, rather thin, translucent, malleated; colour 

 pale horny-brown, the umbilicus darker, the first 2^ whorls yellowish ; 

 sometimes a pale spiral yellow band on the base. Spire flatly convex, 

 obtuse ; whorls '6\ rapidly increasing, rather flattened ; above with nume- 

 rous irregular shallow indentations sometimes arranged in oblique lines, 

 the first \\ 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 0.38 ; height 0-25 ; breadth of aperture 0.2 inch. Dentition, 16-0-16. 

 Hab. Stewart Island (Mr. T. Kirk). 



The shell can be distinguished from that of R. greenwoodi by the base 

 being rounded. 



