new and rare Crustacea from Scotland. 56 
process twice as long as broad and furnished with a long 
slender terminal seta; the secondary joints are small, sub- 
ovate, with irregular margins, and carry five sete—one at 
the apex, one on the inner margin, and three on the outer 
margin; the apical seta is longer than the others (fig. 15). 
Caudal stylets very short. 
Habitat. Cromarty Firth; near Dunbar, at the mouth of 
the Firth of Forth ; Port Erin, Isle of Man. 
Remarks. ‘Vhis small species closely resembles Pseudo- 
westwoodia Andrew? in size and in general appearance, but 
differs. distinctly from it in the structure of the anterior an- 
tenne and of the first and fifth feet. It appears to have an 
extensive distribution. 
Pseudowestwoodia major, sp.n. (Pl. VI. figs. 17-20.) 
Description of the Species.—Kemale. Length *6 millim. 
(J5 of an inch). In general appearance closely resembling 
the species just described, but larger (fig. 17). Anterior 
antenne eight-jointed, the first two stout, the others more 
slender; the two end-joints are subequal and shorter than 
any of the other six joints. The proportional lengths of all 
the joints are shown by the formula— 
Proportional lengths of the joints.. 15.15.18.12.8.8.5.6 
Number of the joints ............ Ps oe be 6. 7, 8 
The posterior antenne and mouth-organs are somewhat like 
those of the last species, but the second joint of the posterior 
foot-jaws bears a small seta near the middle of the inner 
margin, and both the outer and inner margins are partially 
fringed with minute hairs; there are also two sete at the 
base of the terminal claw. The first pair of swimming-feet 
have the first joint of the inner branches proportionally more 
elongate than that of the same pair in either of the other two 
species of Pseudowestwoodia, the first joint of the inner 
branches in this species being equal to fully twice the length 
of the outer branches; the end-joints, like those of the inner 
branches of the first pair in the species just described, have a 
pseudodivision across the middle, while the armature of both 
the inner and outer branches is very strong (fig. 19). The 
second, third, and fourth pairs are very similar to those in 
the other two species. Fifth pair large, foliaceous; basal 
joint nearly as long as broad; the inner portion, which 
reaches to the extremity of the secondary joint, bears five 
stout setiferous spines round the broadly and irregularly 
curved apex; the exterior angle is not produced, but is 
