12 A. O. WALKER. 
Mandibles as in A, neglectus, Hansen,* but the projection from the molar tubercle, 
which appears to be membranaceous, is less prominent. The third joint of the palp is 
straight. 
First and second maxille# as in A. neglectus. 
Mazillipeds as in A. neglectus. 
First gnathopods: Side plates small, rather wider than deep. First joint as long 
as all the rest, four times as long as wide. Wrist longer and wider than the hand, 
unequally setose on the hind margin. Hand not subchelate, narrowing distally, the 
front margin convex, the hind slightly concave, spinulose along its entire length, with 
four spines at unequal intervals. 
Second gnathopods: Side plates semi-oval, extending to about one-third of the first 
joint. First joint subequal to the next three united, widening to about one-fourth of 
its length from the distal end, then narrowing. Wrist longer and wider than the hand, 
the hind margin densely setose ; hand with subparallel margins, both setose. Dactylus 
well developed. 
First and second pereeopods : Side plates rounded below, those of the second pair 
obtusely angulated about the middle of the hind margin. The fourth joint is about 
half as long and twice as wide at the distal end as the fifth; the hind margin of the 
latter terminates in an acute angle. 
The remaining pereeopods are subequal in length and structure, robust, the third 
joint expanded, the fourth with both margins produced downwards; the hind margins 
of the first joints in the third and fourth pairs are smooth, except the lower part, which 
is obscurely crenate ; in the fifth pair the whole margin is serrate. 
First and second uropods: Peduncles subequal to the outer rami, inner rather 
longer ; all parts sparsely spinous. The first pair extend beyond the second and these 
beyond the third. 
Third uropods: Inner rami lanceolate, as long as the peduncle, and reaching to the 
end of the first joint of the outer ; margins finely spinulose. 
Telson about as wide at the base as long, cleft about two-thirds of its length, 
divisions dehiscent, rounded. 
Both specimens had the third and fourth perseopods turned up over the back. 
ORCHOMENE Gontops.t (Plate 3, fig. 6.) 
Orchomene goniops, A. O. Walker, Ann, and Mag. Nat. Hist. XVII. (1906), p. 455. 
W.Q., 21 Aug., 1903 ; two specimens, probably immature ; length 5 mm. 
Body-segments increasing in length backwards. /irst four side-plates deeper than 
the segments, narrow. Third pleon-segment with a small postero-dorsal carina and hind 
and lower margins straight, the former crenate, the posterior angle rather less than 90°. 
* Vidensk. Meddel. 1887 (1888), p. 67. 
t yervia, angle; &y,, face. 
