20 
A. 0. WALKER. 
There are other slight differences, such as the greater relative width of the first 
joint of the upper an ten me ; more slender gnathopods; the third joints of the fourth 
and fifth perseopods more acutely produced, etc. It is possible that it might prove to 
be a distinct species if the males were known. 
Proboliella. 
Proboliella, A. 0. Walker, Ann. and Mag. Nat. Hist. XVIII. (1906), p. 13. 
Mandibles with a two-jointed palp. 
First maxillse with a two-jointed palp. 
Maxillipeds with the inner plates divided to the base ; the outer more or less 
developed. 
Second perseopods not stronger than the first; third perseopods with a narrow first 
joint ; fourth and fifth with an expanded first joint. 
P. typica. (PI. 6, fig. 10.) 
P. typica , A. O. Walker, Ann. and Mag. Nat. Hist. XVIII. (1906) p. 11. 
/c/OpL p'( c W.Q., Hut Point, 11 Nov., 1902, one; 13 Oct., 1902, one; 18 Feb., 1904, one. 
All females. 
Female — 
Body tumid. Posterior angle of the third pi eon segment produced and rounded. 
Eye small, round, colourless in spirit. 
Upper antennre without an appendage, reaching to the middle of the flagellum of 
the lower ; the third joint half as long as the second ; flagellum seven-jointed, as long 
as the two last joints of the peduncle. 
Mandibles bent downwards from the base of the palp and narrowed towards the 
coarsely toothed cutting edge ; the palp more than half the length of the mandible ; 
the first joint less than one-fourth as long as the second. 
Maxillipeds: Inner plates divided; outer distinct, though narrow; first and 
second joints of the palp subequal, the third longer. 
First gnathopods : Wrist shorter and narrower than the hand ; palm very oblique, 
about as long as the rest of the hind margin, spinulose, and defined by two or three 
long spines. 
Second gnathopods : Side-plates oblong, convex in front, straight behind, the angles 
rounded with a small tooth. First joint strong, as long and more than half as wide as 
the hand, fringed with setse before and behind ; third joint produced behind to a very 
acute point, which extends a little beyond the carpal process. Hand subelliptical, 
the palm longer than the rest of the hind margin, convex, spinulose, and defined by a 
strong tooth, beyond which is a smaller tooth and a group of spines. 
First perseopods : Side-plates oblong, angles rounded, margins parallel; first 
