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 h'rst joint of the fourth and fifth 

 perseopods serrate like the third. 



PODOPRIONIDES INCERTA. (PI. 5, fig. 8.) 

 Podnpnonides mcerl/i, A. 0. Walker, Aim. and Mag. Nat. Hist. XVII. (_KK)6), p. -157. 



W.Q., 29 Aug., 1902, Hole 12, D net, one specimen ; length 2 mm. 



Body not wry compact ; the anterior side plates small. 



Upper antennse reach in;/ 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 setae at 

 the extremity. 



Loir< r anfennte: Peduncle stout, margins of third joint produced. Mandibular 

 palp with the third joint moie 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 clistally ; second and third 

 joints subequal ; wrist subequal to the hand ; the hind margin of the hand is short, 

 conre.c and i>rolun<jed in a spine-like process, ic/neh /.v slightly curved inn-aril^ to nn-ii 

 the point of the curved dactylus, forming a completely chelate joint ; palm very oldimie, 

 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 perseopods have the first joints 

 broadly ovate, the hind margins deeply serrate, as in Podoprion, Chevreux, and 

 Podoprionella, Sars. 



Uroj >o<lx : 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. PHOXOCEPHALID^E, G. 0. SARS. 

 HARPINIA OBTUSIFRONS. 



Harpinia obtusifrons, Stebbing. 



W.Q., Oct. -Nov., 1902, Hut Point; three, length of largest 6 mm. W.Q., 15 

 June, 1902, D net, twelve young. 



* Memoires de la Societe Zool. de France, Tome IV. (1891), p. 6, PL I. 



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