Nannonyx 35 



I Uropod 3, outer ramus with 2d Joint conspicuous 2. N. integrieauda . . p. 35 

 ) Uropod 3, outer ramns with 2d Joint miuute — 3. 



I Side-plate 4 little expaudcd backward 8. K". goesii p. 36 



) Side-plate 4 greatly expanded backward — 4. 



f Pleon seginent 3, angles acutely upturned ... 4. N. thomsoni . . . p. 36 

 I Pleon Segment 3, angles rounded 5. H". kidderi . . . . p. 36 



1. N. spinimanus A. Walker 18P5 N. s., A. O. Walker in: P. Liverp. biol. 

 Soc, t'.9 p. 292 t. 18 f. 1—11; t. 19 f. 6a. 



Pleon Segment 3, postero-lateral angles rather acute with the point 

 bluut. bind margin straight, serrate, 4*^ segment with prominent rounded 

 hump. Antenna 1, flagellum 7-jointed. accessory flagellum 4-jointed. Antenna2, 

 flagellum in d and 9 5-jointed, shorter than peduncle. Mandible with broad 

 cutting edge. Maxiila 1, inner plate with 2 setae, outer plate broad, apex 

 decurrent. Maxilla 2, inner plate twice as broad as outer. Maxillipeds, inner plates 

 not reaching beyond 1*** Joint of palp, outer plates with spine-teeth fringing inner 

 margin, 4*^ Joint of palp very small. Gnathopod 1, 5*^ and 6**^ joints stout, 

 e**" little longer than 5^^ tapering distally more in ö than in 9, leaving a 

 small palm margin. Gnathopod 2 subchelate, 6**^ Joint rather shorter than 

 5*^ and nearly as wide. Peraeopods 3 — 5, 2<^ Joint expanded, 4*'* in peraeo- 

 pods 3 and 4 wider and more produced than in peraeopod 5. üropods 1 and 2, 

 rami shorter than peduncles. Uropod 3, outer ramus in ö rather shorter 

 than peduncle, in 9 about half as long as peduncle, inner ramus ovate. 

 Telson as broad as long, distally naiTowed and rounded, carrying a pair of 

 marginal spinules. Colour brown. L. 4*5 mm. 



Menai Strait [North -Wales]. 



2. N. integrieauda (Stebb.) 1888 Ämbasia L, T. Stebbing in: Rep. Voy. 

 Challenger, v. 29 p. 695 t. 26. 



Side-plate 1 distally somewhat, 4**^ very considerably, expanded. Pleon 

 segment 3, postero-lateral angles outdrawn into a little blunt point; 4*^ 

 without perceptible dorsal depression. Antenna 1, 2*^ Joint half length of 1***, 

 flagellum 5-jointed, shorter than 1»* Joint of peduncle, accessory flagellum 

 2-jointed. Antenna 2 ( 9 ?), last 3 joints of peduncle nearly equal, flagellum 

 small, with 4 joints, the first the longest. Mandible, 1^* Joint of palp rather 

 long. Maxilla 1, inner plate distally rounded, with one simple seta, outer 

 plate with 11 spines. palp caiTying 4 spines on apex of 2*^ Joint. Maxilla 2, 

 plates subequal, not very narrow. Maxillipeds, inner plates long, narrow, with a 

 iew small setae and perhaps 3 tooth-spines on the apex, outer plates reaching 

 halfway along 3<^ Joint of palp, 4*^ Joint of palp very small, the nail forming 

 half its length. Gnathopod 1, 5^^ and 6**^ joints subequal, very scantily armed, 

 not very long, 6*^ Joint tapering, without palm. Gnathopod 2, 3'^ Joint as long 

 as 5*^, 6^^ half length of 5**". Peraeopod 1 slender, 7*^ Joint rather elongate. 

 Peraeopods 3 — 5, 2^ Joint expanded, overlapping 3^, 4*^ not very broad. 

 Pleopods, peduncle broad, each ramus only 4-jointed, the outer with an extremely 

 broad 1^* Joint, 1^* Joint of inner narrow. Uropod 3, the short outer ramus 

 subequal in length to the peduncle, its 2*^ Joint nearly as long as the l^S 

 inner ramus more than half length of outer, each with inner margin serrulate. 

 Telson tapering to a rounded apex. L. 3 mm. 



ßoyal Sound [Kerguelen Island]. Depth 50 m. 



