30 EEV. T. R. R. STEBBING ON AMPHIPODA FROM 



Mouth-organs of the character usual in the genus, but palp of first maxilla with the 

 apex rather Avide, carrying one little spine and six very distinct teeth. 



First QRcdhopods. Side-plates widened below, deeper than Avide. The second joint 

 shorter than the four succeeding joints combined, the fifth rather stouter than the 

 tapering sixth and quite as long ; finger small. 



Second gnathopods. The second and third joints rather long and slender, the fifth as 

 long as the third, the sixth much more than half as long as the fifth, at first gradually 

 but distally rather abruptly widened ; palm transverse, finger very small. 



First and second prrtropods. Side-plates of the second pair broad, the excavation being 

 moderate in breadth and deptli. The joints of the limbs of moderate dimensions, fringed 

 with smooth setse or spines. 



Third perccopods. Side-j^lates much wider than deep, the front lobe deeper than the 

 hinder. Second joint much wider than deep, almost as large as the side-plate, the fourth 

 joint little widened. 



Fourth per mopods. Second joint longer than broad, front margin strongly bowed, hind 

 margin sinuous, fourtli joint scarcely widened. 



Fifth perceopods. Second joint much larger than in the preceding pairs, very broad, 

 but rather longer than broad ; fourth joint scarcely widened. 



Marsupial plates slender, branchial vesicles rather strongly pleated. 



TJropods. First pair Avith the rami subequal, slender, carrying a few margmal spines, 

 somewhat shorter than the peduncle. Second pair shoi-ter than the first ; peduncle 

 scarcely as long as outer ramus, which lias four marginal spines ; inner ramiis slightly 

 shorter, stout, with two spines, then strongly constricted with a spine in the notch. 

 Third pair much shorter than second ; peduncle rather longer than the rami, with one 

 lateral margin running out into a point, the other notched near the middle, the rami 

 almost smooth, eqiial. 



Tel son reaching little beyond the sides of the sixth pleon segment, little longer than 

 broad, boat-shaped, apex truncate. 



Colour of specimen, in spirit, brownish. Length about three-tenths of an inch. 



Specimen labelled " Zi/sianasscc aff". Paa en Reise til Cuba." Copenhagen Museum, 

 Studer Collection. 



Fam. STEGOCEPHALIDiE. 



AXDANIOTES, n. g. 



Head wdth small rostrum. First segment of peragon the longest. Sixth segment of pleon 

 longer than the fourth or fifth. Each of the first three side-plates socketed in a groove 

 on the underside of that next succeeding ; the fourth very large, subequal in breadth and 

 depth, with a wide shallow excavation behind, overlapping the fifth and in part the sixth. 

 Eyes wanting. First antennse with very thick first joint ; flagellum tfipering, the first 

 joint A'cry long, longer than the remaining three combined ; the accessory flagellum small, 

 one-jointed, tipped Avith a long spine. Second antennae with the last joint of the 

 peduncle shorter than the penultimate, flagellum short. Epistoma carinate. U2:)per 



