392 Axelboeckia, Brachyuropus 



margin. üropod 1 miicb tlie longest, rarai siiboqual, sligbtly longor tlian 

 peduncle. Uropod 2, nimi subequal, louger tban peduncle. Uropods 1 — 3 

 veiy sligbtly armed. Telson exti-emely small, broadly triangulär, lengtb not 

 balf tbe breadtb, incision about to tbo middle, apices rounded. L. ö 25, 

 9 20 mm. 



Caspian Sea. Deptli 13 — -282 m. 



2. A. carpenterii (Dyb.) 1874 Gmumarus c, li. iJybowsky in: Horae Soc. 

 ent. Ross., v. 10 suppl. j). 113 t. 13 f. 2 | 1899 Axelboeckia c, T. Stebbing in: Tr. Lina. 

 Soc. London, ser. 2 v.7 p.424 | 1893 Aniathilla homari (pari.) ':*, A. Della Valle in: F.Fl. 

 Neapel, «.20 p. 928. 



All Segments witb a median cariua, low and divided by a transverse 

 depression; all segments witb bind raargin niore or less tbickened, tbe 

 thickening on peraeon segments 1 — 3 and pleon segments 1 — 3 carry ing 

 very small tubercles, representatives of lateral caj'inae; all segments witb 

 marginal swellings, strouger and more carina-like on peraeon segments 1 — 3 

 tban on any otbers; tbe various elevatious feebly developed on pleon segments 

 4 — 6. Head, rostrum long, acute, sligbtly deflexed, witb carina-like compression 

 below; upper surface of bead separated t'rom tbe cbeeks by weak ridge-like 

 elevations, and grooved witb a furrow continued along tbe rostrum. Side- 

 plates 1 — 4 very deep and obliquely outward and downwanl directed, owing 

 to tbe breadtb and flatness of tbe body. Eyes moderately large, prominent, 

 biscuit-sbaped, black. Autenna 1 about ^4 as long as body, and about Ys longer 

 tban antenna 2, peduncle stouter and usually longer tban peduncle of antenna 2, 

 3^ Joint longer tban 2^, in d flagellum Avitb 12 joints, accessory flagellum 

 witb 2; antenna 2, flagellum witb 4 joints; but in (mucli longer) Q autenna 1, 

 flagellum witb 20 — 29, accessory flagellum witb 4 or 5, antenna 2, flagellum 

 witb 7 or 8 joints. Gnathopods 1 and 2, 5*'^ Joint sbort, 6*'^ Joint broad, 

 oblong, tbat of gnatbopod 1 somewbat larger tban tbat of gnatbopod 2 (in flgure 

 equal in size), tbe lengtb little greater tban tbe breadtb, whicb encreases to 

 tbe palm, tbis being oblique, well deflned, subequal to tbe bind margin. 

 Peraeopods 3 — 5, 2'^ Joint not broad, bind margin feebly convex, witb few 

 but ratber long setae. üropods 1 and 2 reacbing end of uropod 3 or 

 rather beyond. Uropod 3 7i5 as long as body, inner ramus about ^/g as long 

 as outer, witb simple setae, outer witb a few plumose setae on inner margin. 

 Telson cleft almost to centre (in flgure less tban ^3 of lengtb). Colour 

 brown or yellow. L. d' 11, Q 24 — 31 mm. 



Lake Baikal. Depth 50—300 m. 



15. Gen. Brachyuropus Stebb. 



1899 Brachyuropus, T. Stebbing in: Tr. Linn. Soc. London, ser. 2 v.7 p.424. 



Witb median dentate carina. Side-plate 4 witli projecting tootb. 

 Antenna 1 mucb tbe longer, accessory flagellum long. Gnatbopods 1 and 2 

 similar, subchelate. Peraeopods 3 — 5 elongate. Uropods 1 and 2 elongate. 

 Uropod 3 rudimentary, rami veiy unequal. Telson apically emarginate. 



2 species. 



Synopsis of species: 



Projecting tooth of side-plate 4 compressed, directed 



obliquely downward 1. B. gre^vingkü . p. 393 



Projecting tooth of side-plate 4 rounded, directed horizontally 



outward 2. B. reichertii • • p. 393 



