Cumton.—On the Isopodan Fauna of New Zealand. 145 
obliquely across the body, its retractor muscle is attached to its posterior 
end and arises from the left posterior portion of the foot. The ovotestis 
and spermatheca were not seen, but the peduncle of the latter is long and 
opens into the vagina at some distance from the reproductive orifice. The 
vas deferens leaves the oviduct about half way down, passes forward almost 
as far as the reproductive orifice and then bends sharply backward opening 
into the posterior end of the penis. 
Hab. Dunedin and Shag Point, on rocks and on the roots of D’ Urvillea 
utilis. 
EXPLANATION OF PLATE XVII. 
A. Siphonaria obliquata. Alimentary system. 
B. 5 a Reproductive system. 
C. i re Jaw x 6 
D. s n Teeth x 190. 
E. Siphonaria australis. Jaw x 13. 
F. E. $i Portion of radula x 11. 
G. 5 k Teeth x 
H. Siphonaria zealandica. Alimentary system. 
: s i Reproductive system. 
K. 5 P Jaw x 22 n specimen). 
L. na m Radula x 11. 
M. Teeth x uk 
N. Südonaria yédtadon lion. Alimentary system. 
0. » i spp system. 
E: E d Nervous system 
Q. m AW X 
R a Teeth x 815. 
S. Gadinia nivea. ccm system 
T: P js oo. Sian (portion only). 
AS; » oe Radula 
V. E Teeth x a 
go nm to Letters on Reproductive Systems. 
a, Penis,—b, accessory gland.—c, vas deferens.—d, retractor of penis.—e, ovotestis. 
—f, oviduct.—g, spermatheca. The numbers under the teeth signify the number of the 
tooth from the central one, which is marked c. 
Art. X.—Additions to the Isopodan Fauna of New Zealand. 
By Cnmanues CHILTON. 
{Read before the Philosophical Institute of Canterbury, 6th April, 1882.) 
Plate XVIII 
Wane staying for a few days at Timaru during the last Christmas holidays 
I contrived to collect a few small Crustacea from amongst the seaweed that 
is exposed at low tide, just at the north side of the breakwater. 
10 
