1870. j MR. J. BRAZIER ON NEW LAND-SHELLS, 659 
section of the genus, distinguished by the general pale colour of the 
shell and animal, the very slight indication of the dorsal keel, and 
by the peculiar distribution of colour on the crown of the head. 

Rhinoclemmys mexicana. 
1. RHINOCLEMMYS MEXICANA. 
Thorax oblong, slightly and bluntly keeled only in front, over the 
vertebral plates, dark brown, slightly mottled ; dorsal and marginal 
shields thin; the first vertebral shield nearly square, four-sided, 
the second and third oblong, transverse, six-sided ; sternum slightly 
raised on the sides, truncated in front and notched behind; dark 
brown, with an irregular yellow margin; head brown; throat and 
sides of the head yellow, black-spotted ; crown dark brown, with a 
narrow white streak over the nostrils towards the orbits, with a broad 
white lunate band behind, with its front edge just even with the 
eyes, and with an indistinct broad pale streak on each side of the 
occiput. 
Hah. Mexico; San Juan del Rio (Rébouch). 
CHELODINA. 
CHELODINA EXxPANSA, Gray. (Plate XXXIV., young.) 
This species was first described in the Society’s ‘ Proceedings’ 
for 1856 (p. 370), and the young shell was described and was in- 
tended to have been figured. The engraving was made of it at the 
time, but not published ; it is therefore appended to this paper. 
11. Descriptions of Ten New Species of Land-shells, collected 
by Mr. W. F. Petterd, of Hobart Town, Tasmania. By 
Joun Brazier, C.M.Z.S. 
1, Hetix (CHAROPA) CURAGOA, Nn. s. 
Shell rather widely umbilicated, depressed, thin, very closely and 
finely plicately ribbed, interstices smooth, white, not shining; spire 
