400 REV. O. P. CAMBRIDGE ON [June 1, 
however, are destitute of the single characteristic tooth on the inner 
side of their front surface; and (in spirits of wine) the abdomen is 
pretty distinctly marked with various lines and mottlings of dull 
yellow, very faintly indicated in the male; the sexual aperture is 
furnished with a short prominent process of a characteristic form, 
impossible to describe clearly, and not easy to delineate certainly ; 
fig. 6d is an attempt to represent its appearance slightly in per- 
spective. : 
This species is allied to Z. livida, Bl., as well as to EZ. subtilis 
(Cambr.) and others, but cannot be confused with them if the pro- 
tile of the cephalothorax, the armature of the falces, and the form 
of the radial joint of the palpus and the palpal orgaus be carefully 
observed. 
An adult of each sex was received from Mr. Emerton, by whom 
they were found under a stone, below high-water mark, at Peaks 
Island, Boston, Massachusetts, U.S. A., in August 1873. 
ERIGONE PERSOLUTA, sp.n. (Plate XLVI. fig. 7.) 
Adult male, length rather over 1 line. 
The cephalothorax, falces, and maxille of this Spider are of a 
yellow-brown colour, the margins of the cephalothorax being 
blackish ; the legs and palpi (except the digital joints of the latter, 
which are yellow-brown) are of a dull orange-yellow colour; the 
labium and sternum are suffused with blackish brown; and the ab- 
domen is dull black, with a strong olive-green tinge, marked (in 
spirits of wine) with fine pale spots and lines. 
The form of the cephalothoraz is of the ordinary type; looked at 
in profile, the line from the foremost eyes to the thoracic junction is 
a gentle curve with a very slight hollow at the occiput ; the height 
of the clypeus, which is a little prominent at its lower margin, rather 
exceeds half that of the facial space. 
The eyes are of tolerable size, and in the usual position, on black 
spots, but rather closely grouped together; those of the front row 
are very nearly contiguous to each other; those of the hind central 
pair are separated by an interval not quite equal to an eye’s diameter, 
and each is separated from the hind lateral eye on its side by an 
interval rather less than that which divides those of the hind central 
pair ; those of each lateral pair are obliquely placed, contiguous to 
each other, and apparently the largest of the eight; each of the fore 
centrals is separated from the hind central eye nearest to it by a 
space equal to its own diameter. 
The legs are of tolerable length and strength, their relative length 
being 4, 1, 2, 3; they are furnished with hairs, bristles, and a few 
fine spines. 
The palpi are not very long, the radial and cubital joints very short, 
the former being the strongest ; it is largest at its fore extremity, but 
has no apophysis ; and among other, finer hairs it has several longer 
and stronger bristly ones issuing from its fore extremity, near the 
outer side ; the cubital joint has a single slightly sinuous bristle at 
its fore extremity, a little towards the outer side; the digital joint 
