412 Gmelina 



23. Gen. Gmelina 0. Sais 



1894 Gmelina, (0. (irimm in MS.) Gr. O. Sars in: Bull. Ac. St.-Petersb., ser. 5 

 v.l p. 191. 



Head with small rosti'um. lateml lobes ratber small. 8ide-plates 1 — 4 

 larger iu than in d\ 4^^^ not very wide, nor strongly emarginate. Antenuae 1 

 aud 2 subequal, not elongate, slender, accessory flagellum 1-joiuted. Mouth- 

 parts nearly as in Gammarns (p. 460), but upper lip witb no emargination at apex 

 and witb an obtuse prominence in front. MaxiUa 2 witb outer plate considerably 

 broader tban inner, palp of maxillipeds ratber sbort, witli 3"^ Joint distally 

 expanded. Guatbopods 1 aud 2 alike, subchelate, feeble in 9 , stronger in ö. 

 Peraeopods 1 — 5 not elongate, successively sborter to peraeopod 3 and tbence 

 successively longer, 2*^ Joint ratber larger and uiore laminar in peraeopod 5 

 than in 3 or 4. Uropod 3 inore or less projecting, outer ramus well developed, 

 with very small 2^ Joint, inner ramus small, scale-like. Telson deeply cleft. 



4 species. 



Synopsis of species: 



j Many segraents with conspicuous projections — 2. 

 \ No Segments with conspicuous projections — 3. 



t With median dorsal carina 1. G-. costata . . . p. 412 



\ Without median dorsal carina 2. ö. ku8nezo"wi . p. 413 



j Uropod 3, inner ramus longer than peduncle ... 3. G. laeviuscula . p. 413 

 I Uropod 3, inner ramus not longer than peduncle . 4. G. pusilla . . . p. 414 



1- G. costata O. Sars 1894 G. c. (O. Grimm in 31S.), {Palasiella macera in MS.) 

 (t. O. Sars in: Bull. Äc. St.-Petersb., scr. 5 i: 1 p. 192 t. 3. 



Very slender aud compressed, especially in (j , integument crustaicous. 

 median dorsal carina beginning taiutly on peraeon segmeut 1, reaching bigbest 

 elevation on pleon segment 3, tbe obtusely triangulär laniiuar process on 

 tbis and on tbe liext precediug and 2 following segments being very con- 

 spicuous, pleon Segments 4 and 5 ending in upturned points, segment 6 

 smootb. On peraeon segments 1 — 7 prominences near tbe side-plates form 

 a low obtuse lateral keel. Head, rostrum triangulär, not elongate, lateral 

 lobes broadly truncate, post-antennal corners acute. Pleon segment 2, 

 postero-lateral corners acutely produced. in segment 3 acute, subquadrate. 

 Kyes oval reniform, not large, dark. Antenna 1, 1^* Joint nearly as long 

 as 2"^ and 3^ combined, 2'^ not twice as long as 3^, flagellum little longer tban 

 peduncle. witli about 16 sbort joints, accessory flagellum witb 3 setules at tip. 

 Antenna 2 in (S equal to anteima 1, ultimate Joint of peduncle as long as 

 penultimate, flagellum 8-jointed, iu . ratber sborter tban antenna 1. ultimate 

 Joint of peduncle sborter tban penultimate, flagellum 6-jointed. Gnatbopods 1 

 and 2 in d, 6*^ Joint much longer tban 5^^ large, oblong oval, wideuing 

 a little to tbe concave palm, wbicb is detined by a nearly rectangular lobe, 

 armed with 2 strong spines, between wbicb tbe strongly curved flnger 

 impinges. Gnatbopod 1 in c feeble, 6^^ Joint longer than 5*''. oblong 

 quadrangular, palm ratber oblique; gnatbopod 2 ratber more slender, 6^^ Joint 

 as long as 5*'', palm nearly trausverse. Peraeopods 3 and 4, 2*^ Joint little 

 expanded, narrowing distally. Peraeopod 5, 2^ Joint oblong quadrangular. 

 Uropod 2 tbe smallest, tbe rami linear, witb sjiines only at tbe apex. Uropod 3 

 large, projecting far beyoud tbe others. peduncle sbort and thick. outer 

 ramus large, foliaceous, margins setose aud spinulose, apex broad, witb a 



