248 Part 11 —Twelfth Annual Report 
Outer branches slender, three-jointed, and equal to nearly three-fifths the 
length of the first joint of the inner branches. Inner branches of the 
second, third, and fourth pairs, short, two-jointed ; those of the fourth 
pair scarcely reach beyond the end of the first jomt of the outer branches. 
The outer branches of the fourth pair are short, stout, and very setose. 
In the fifth pair both joints are broadly foliaceous and sub-quadrate, and 
bear a number of strongly plumose terminal setz. Caudal stylets equal 
to one and a half times the length of the last abdominal segment, and 
clothed with minute hairs. 
Male.—Anterior antenne very robust. The three last joints, which 
together form a claw-like appendage, are joined to the preceding joint 
by a strong hinge-like process, by which they can be folded back upon 
that joint, thus forming a powerful grasping organ. The inner branches 
of the fourth pair of thoracic feet are very rudimentary, and consist of 
two minute joints ; the outer branches are three-jointed and robust. The 
first joint is considerably longer than the next two together. The first 
and secoud joints are each armed with a stout spine at the distal end ; 
while the last joint bears three spines, one small and two large, as shown 
in the figure. Fifth pair rudimentary, consisting of a slightly produced 
basal portion carrying four setze on small basal projections, and a minute 
spine on the inner margin. ‘The sixth appendage consists of a small 
bilobed process, each lobe bearing a stout apical seta. 
Habitat.—In pools of brackish water at the mouth of a small stream 
near Aberlady, Firth of Forth; and in similar pools at the mouth of the 
River Alness, near Invergordon, Cromarty Firth. 
Remarks.—This species somewhat resembles Laophonte curticauda, 
Boeck. The outer branches of the male fourth thoracic feet are not very 
unlike those of the male third pair of that species, but the structure of 
the inner branches is very different. Lavphonte littorale appears to be 
confined to localities where the water is more or less brackish. 
(1) Laophonte simulans,* sp. n. (PL VII. figs. 24-32 ; Pl. VIII. fig. 1). 
Description.—Female. Length *43 mm. (th of aninch). Body seen 
from above, broadly ovate, depressed. Forehead produced into a broad 
blunt-pointed rostrum. Anterior antenne robust, shorter than the first 
cephalo-thoracic segment, six-jointed. The third joint is considerably 
longer than any of the others, while the fourth and fifth are small; a 
long slender filament springs from the fourth joint (fig. 1, Pl. VIIL). 
The proportional lengths of the joints are shown by the formula :— 
14° 18-280 bier ae § 
Lit 241k Sele 
Basal joint of posterior antenne robust. Second joint shorter and much 
narrower. Secondary branch short, bearing four terminal plumose sete 
(fig. 25, Pl. VII.). Mandible elongate, slender, and provided with a small 
one-jointed palp (fig. 26, Pl. VII.). Posterior foot-jaws stout, armed with a 
powerful strongly curved terminal claw, rather shorter than the joint from 
which it springs (fig. 27, Pl. VII.). Inner branches of the first pair of thoracic 
feet elongate and robust. A small blunt-pointed spine springs from near 
the distal end of the first joint. The second joint is short, being only equal 
to about one-fifth of the leneth of the first jomt: Terminal claw stout, and 
strongly hooked at the end. Outer branches are slender and three-jointed, 
aud about two-thirds the length of the first joint of the inner branches. 
The second and third pairs are moderately stout, and have the inner 
branches two and the outer three-jointed,—the inner branches being 
shorter than the outer (fig. 28, Pl. VII.). In the fourth pair the inner 
* Simulans = mimicking. 
