126 
ARACHNOIDES ANTIPODARUM. 
Body rather convex, with five broad sunken grooves, rather more 
than one-third the width of the sections of the body, and forming in- 
flexed spaces on the edge of the circumference; ambulacra nearly 
straight, and regularly diverging, without any isolated pores between 
the end of the ambulacra and the circumference of the body. 
Hab. New Zealand. Coast of Wanganui. 
This species is easily known from the A. placenta of the North Sea 
(Agassiz, Monog. t. 21. fig. 25-42) by its being rather larger and con- 
siderably more convex, and in the grooves edged above by the ambu- 
lacra being broader compared to the sections of the shell. It differs 
also in having the ambulacra nearly straight and without any isolated 
pores between them, as in the edge of the shell figured by Agassiz, 
t. 21. f. 39. 
The specimen was unfortunately broken in the carriage from New 
Zealand, and the part of the shell containing the ovarial pores was 
destroyed. 
The upper and lower part of the shell is supported by compressed 
perpendicular columns, about one-third the width of the disk; near 
the oral disk there are placed five pairs of short processes for the sup- 
port of the jaws; the jaws are triangular; they agree, as does the 
disposition of the spire, tubercle, and all the other external characters, 
with the northern species as figured by Agassiz from the specimen 
in the Museum collection. 
4, REMARKS ON THE GENUS HAPALOTIS. 
By Joun Goutp, F.R.S. 
With the view of correcting some errors respecting the members 
of the genus Hapalotis, and of describing two new species, Mr. Gould 
exhibited an extensive series of specimens, including several species of 
this curious form of Rodent, from his own collection: viz.— 
1. Hapauoris ausipes, Licht. 
2. Hapatoris Apicauis, Gould, n. s. 
This new species is about the size of, and similar in colour to, 
H. albipes, but it has larger ears, and its feet, which are perfectly 
white, as in that animal, are much more delicately formed, and the 
tail is nearly destitute of the long brushy hairs towards the tip; the 
eye is also much smaller. 
Face and sides of the neck blue-grey ; upper part of the head, space 
between the ears, the ears and upper parts of the body, pale brown 
interspersed with numerous fine black hairs; under surface white ; 
flanks mingled grey and buffy white; fore feet white, with an ob- 
lique mark of dark brown separating the white from the greyish 
brown of the upper surface ; hinder tarsi and feet white ; basal three- 
fourths of the tail brown, apical fourth thinly clothed with white 
hairs. 
