212 REV. O. P. CAMBRIDGE ON [ Mar. 16, 
in the same straight line, is the fore central pair, the eyes of which are 
rather larger than usual and not quite contiguous to each other; each 
of them is separated from the fore lateral on its side by a little more 
than the diameter of the latter. All the eyes form a quadrilateral 
figure, longer than broad, and its hinder side longer than its fore side. 
The legs are moderate in length, their relative length being 4, 1, 2,3; 
they are slender, of an orange-yellow colour, and sparingly furnished 
with short hairs. 
The palpi are short, slender, and similar in colour to the legs ; 
the cubital joint is of moderate length, gradually converging from 
its fore extremity to its hinder one ; the radial joint is short, rather 
dilated, and has its fore extremity on the upperside produced into 
a longish, rather slender, neatly straight, slightly tapering, not very 
sharp-pointed apophysis, having the same general direction as the 
cubital joint ; the digital joint is small, and of the ordinary oval 
form: the palpal organs are neither very prominent nor complex ; 
they have a small black filiform coiled spine at their fore extremity, 
but otherwise they present no remarkable feature. 
The falces are small, straight, nearly perpendicular, similar in 
colour to the cephalothorax, and armed with a few minute teeth to- 
wards the extremity on their inner surface. 
The mawille and labium are of normal form, and similar in colour 
to the falces. 
The sternum is of a deep brown colour, and its surface is marked 
with roundish punctures. 
The abdomen is large, of broad oval form; along the middle of 
the fore half of the upperside is an oval coriaceous patch of a 
darkish yellow-brown colour; the hinder part of this patch is the 
most obtuse; on either side, and throughout its whole length, the 
abdomen is dilated, forming a kind of cushion, which rises above 
the central portion ; these dilatations are of a dull yellowish whity- 
brown colour, obscurely mottled with largish spots of a deeper hue ; 
the hinder part of the central portion is of a dull browish colour, 
with some obscure, pale, transverse curved lines, perhaps visible 
only in spirit of wine. The spinners are enclosed in a sort of short, 
sheath-like case, split into several portions. 
The adult female is rather larger than the male, but is similar in 
general form and colouring; the cephalothorax, however, has no 
trace of the occipital eminence ; and the relative length of the legs is 
different, 1, 4, 2,3; the abdomen has the same peculiarity of form, 
but not so marked in its character, and the oval coriaceous patch on 
the fore part of the upperside is wanting. The form of the genital 
aperture is characteristic (see f, fig. 19, Plate XXIX.). © 
An adult example of each sex of this very distinct species (which 
may be easily distinguished by the form of the abdomen alone) was 
received from M. Eugéne Simon, by whom it was found at Morocco. 
ERIGONE THORACATA, sp. n. (Plate XXIX. fig. 20.) 
Adult male, length 2 of a line. 
The cephulothorax of this species is of a deep brown colour; the 
