EEPOET ON THE AMPHIPODA. G95 



Amhasia integricauda, n. sp. (PI. XXVI.). 



This minute species externally, except in colour, so much resembled Socarnoides 

 hergtieleni, that the single specimen was dissected before the differences were appreciated, 

 hence no whole figure could be given, and the line in the plate indicating the natural 

 size is an estimate instead of a measurement. The specimen was a female with eggs. 



There are some small scattered hairs on the back. The hinder lateral angle is rounded 

 in each of the first three segments of the pleon, rather sharply so in the third, which has 

 the lower half of the lateral margin outdrawn ; the fourth segment without any dorsal 

 saddle- shaped depression. 



Eyes present ; shape not observed. 



Uiyper Antenna tapering, first joint long and stout, with a few fine scattered hairs, 

 second joint half the length of first, third not much shorter than second, flagellum of 

 five joints together shorter than first joint of peduncle. To these joints are attached 

 cylindrical appendages, most of which surpass in length the whole flagellum. In the 

 slender two-jointed secondary flagellum the first joint is slightly longer than the first 

 joint of the primary, the second shorter than the second of the same, tipped with fine 

 hairs. 



Lotver Antenna. — The opening of the coiled gland not conical ; the third joint as 

 long as the fourth ; the latter a little curved and rather longer than the fifth ; the whole 

 peduncle slender, not tapering ; the flagellum of four joints, the last one minute ; there 

 are long tapering setse on the three last joints both of the peduncle and of the flagellum. 



Mandibles broad at the base, narrowing to a neck in advance of the cutting edge. 

 The cutting edge is convex, rounded below, with a slightly prominent angle or tooth 

 above. Behind this angle a sort of dentation or wrinkling appears; the secondary plate 

 of the left mandible rather broad, with a convex front edge. In the Plate the outer 

 surfaces of the mandibles are shown, so that the left mandible is represented by the 

 figure m on the right hand ; the true shape of its cutting-edge and secondary plate will be 

 best discerned in the interior of the figure, which shows the new mandible in preparation 

 for appearance after the next skin-shedding. The spine-row consists of three very short 

 serrate spines. The palp has the first joint unusually long, subequal in length to the 

 third ; the margins are naked, the second joint has a small spine or seta close to the 

 distal end, the third joint is tipped with two setae of about its own length, and has on 

 the side the fine adpressed hairs usual in this joint. 



Lower Lip. — Mandibular processes elongate. 



First Maxilla}. — Inner plate broad, distally rounded, with one short hair-like seta at 

 the inner distal angle ; outer plate rather broad, distally edged with a row of seven 

 variously denticulate spines, the outer ones stoutest and least denticulate, and a row of 

 four smaller spines, scarcely denticulate; palp with first joint short, second long, over- 



