GAJVIMARIDEAN AMPHIPODA 31 



Uropods 1 and 2 each with a single ventromedial distal peduncular cusp, 

 lateral and medial margins may have short spines in place of cusps ... 3 



Male gnathopod 1 nearly as large as gnathopod 2, palm weakly sculptured, 

 palm of gnathopod 2 sinuous but lacking sharp teeth. 



B. abyssorum (Bonnier) 



Male gnathopod 1 much smaller than gnathopod 2, palm simple, palm of 

 gnathopod 2 with thi*ee sharp teeth B. linearis J. L. Barnard 



Male gnathopod 1 much smaller than gnathopod 2, articles 5 and 6 subequal 

 in length, palm simple B. lapisi (J. L. Barnard) 



Male gnathopod 1 nearly as stout as gnathopod 2, article 6 much longer than 

 5, palm either toothed or excavate and well defined 5 



Palm of male gnathopod 1 with three large teeth, middle tooth sub- 

 bifid, posterior portion of palm of gnathopod 2 with three distinct 

 teeth, palm not excavate B. abyssi Chevreux 



Palm of male gnathopod 1 with one small but distinct tooth near dactylar 

 base, middle of palm excavate and lacking teeth. 



B. angolae J. L. Barnard 



Lepecliinellidae 



Lepechinella Stebhiiig 

 Lepechinella arctica turpis, new subspecies 



FiGUKES 14, 15 



References to LeiJecMneUa arctica arctica 



Lepechinella sp. Schellenberg, 1924, p. 206, fig. ( unnum.bered ) . 

 Lepechinella arctica Schellenberg, 192Ga, p. 394 (footnote). 



Lepechinella schellenbergi Stephenson, 1944, pp. 19-20, fig. 11 — Gurjanova, 

 1951, pp. G77-678, fig. 465. 



Diagnosis of adult. — Rostrum long, thin, reaching almost to end of 

 first pencluncular article of antenna 1; lateral cephalic margin with 

 two short acute processes on each side ; accessory flagellum 1- or 2- artic- 

 ulate, article 2 very small and appearing fused with first ; palp article 3 

 of mandible longer than article 1 ; coxa 1 scarcely bifid, not extremely 

 elongated, following coxae not strongly elongated or exceptionally bi- 

 fid, dorsal surface of pereonite 1 with two long, erect, acute processes, 

 each pereonite tliereafter with one major process; connnencmg with 

 pereonite 3, rudiments of additional process occur, thereafter increas- 

 ing in size until tooth of pereonite 7 nearly as long as major process; 

 pereonites 5 and 7 bearing additional rudimentary process ; pleonites 

 1-3 with three dorsal teetli each, first two teeth erect, posterior tooth 

 oblique and slightly longer than otliers; pleonite 4 with one oblique 

 process; articulated spines occurring dorsally on all segments but not 

 as densely as in Lepechhiella ech'mata Chevreux; pleonites 5 and 6 

 coalesced; all ploonal epimera each with one slender postero ventral 



