AMPHIPODA. 17 
body, the structure of the mandibular palp and of the outer ramus of the third uropods. 
From Podoprion, Chevreux,* it differs in having the first joint of the fourth and fifth 
pereopods serrate like the third. 
PODOPRIONIDES INCERTA. (PI. 5, fig. 8.) 
Podoprionides incerta, A. O. Walker, Ann. and Mag. Nat. Hist. XVII. (1906), p. 457. 
W.Q., 29 Aug., 1902, Hole 12, D net, one specimen ; length 2 mm. 
Body not very compact ; the anterior side plates small. 
Upper antennee reaching a little beyond the peduncle of the lower; appendage 
2-jointed, the first twice as long as the second, which has a tuft of very long sete at 
the extremity. 
Lower antenne: Peduncle stout, margins of third joint produced. Mandibular 
palp with the third joint more than half as long as the second, narrow, pectinate. 
First gnathopods : Side plates less than half the length of the first joint, rounded 
in front, straight behind, with a notch and a spine above the angle. First joint 
rather longer than the remaining five, widening distally ; second and _ third 
joints subequal; wrist subequal to the hand; the hind margin of the hand is short, 
conver and prolonged in a spine-like process, which is slightly curved invards to meet 
the point of the curved dactylus, forming a completely chelate joint ; palm very oblique, 
smooth, 
Second gnathopods: Side plates oblong, about twice as deep as wide, angles 
rounded. First joint hardly as long as the next three ; second longer and wider than 
the third; wrist about twice as long as the hand, which is oblong, setose on both 
margins, palm transverse. The last three pairs of pereeopods have the first joints 
broadly ovate, the hind margins deeply serrate, as in Podoprion, Chevreux, and 
Podoprionella, Sars. 
Uropods : First and second subequal in extent and scarcely exceeding the third 
pair; the outer ramus in this pair has two subequal joints and is but little longer than 
the inner. The telson could not be made out. 
The single specimen was not dissected ; the mouth-parts therefore could not be 
described. - 
FAM. PHOXOCEPHALIDA, G. O. Sars. 
HARPINIA OBTUSIFRONS. 
Harpinia obtusifrons, Stebbing. 
W.Q., Oct.-Noyv., 1902, Hut Point; three, length of largest 6 mm. W.Q., 15 
June, 1902, D net, twelve young. 
* Mémoires de la Société Zool. de France, Tome IV. (1891), p. 6, Pl. I. 
G 
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