Priscillina, Pontoporeia liJ7 



flagellum more thau half leugth of primarv, o-jointed. Antenna 2, ultimate joiut 

 of peduncle much smaller than large penultimate, flagellum in 9 about half 

 length of peduncle. Gnathopod 1, G**i Joint as long.as o*^ rather broader, 

 palm oblique. Gnathopod 2, palm transverse. Peraeopod 3, hook of 2^^ 

 Joint larger than in peraeopod 4. Peraeopod 5, 2^^ Joint nearly orbicular, 

 5tii gradually expanded distally, with series of short spines. Telsou little 

 longer than broad, notched widely a foui-th of length, each truncate apex 

 with 4 spinules. L. 11 mm. 



Arctic Ocean and North- Atlantic (Greenland; West-Norway ?). 



6. Gen. Pontoporeia Kr0yer 



1842 Pontoi)oreia (Sp. un.: P.femorata), Kreyer iu: Naturh. Tidsskr.. vA p. 152' 

 1891 F., G. O. Sars, Crust. Norway, v.l p.l22 | 1893 P., A.DellaValle in: F. FI. Neapel, 

 V.2Q p. 716 I 1846 Pontoporia, L. Agassiz, Nomencl. zool., Index p.305 | 

 1853 Pojitiporeia, J. D. Dana in: U. S. expl. Exp., v. 13n p. 912. 



Side-plate 5, front lobe the larger. Antennae 1 and 2 

 in 5 subequal, with short flagella. in d flagella long. Mandible 

 normal, palp slender, setose. Maxiila 1, inner plate with a 

 few setae. Maxilla 2, outer plate the broader. Maxillipeds, 

 outer plates not quite reaching end of broad 2*^ Joint of palp, 

 palp's 4^'^ Joint small. Gnathopod 1 setose, 5*^ Joint laminarly 

 expanded, 6*^ smaller than b^'^, palm ill-defined, finger feeble. 

 Gnathopod 2 slender, subchelate or almost chelate, ö*'^ Joint '^.^^ ^^ 

 narrow, finger small. Peraeopod 4 the longest. Peraeopods 1 p. femorata. 

 and 2, 4*'» Joint rather long. Peraeopods 3 and 4, 2'^ Joint »/^''ßTi^". 

 slightly expanded, narrowed below. Peraeopod 5 (Fig. 36),- 

 2*^ Joint greatly expanded, setose. Peraeopods 1 — 5, finger small. üropod 3 

 short, rami 1-jointed, outer the larger. Telson squamiform, deeply cleft. 



3 species accepted. 1 doubtfully distinct. 



Synopsis of accepted species: 



j Gnathopod 1, palm short 1. P. mierophthalma . . p. 127 



\ Gnathopod 1, palm not short — 2. 



j Pleon Segment 4 with furcate dorsal process . 2. P. femorata p. 128 



2 \ Pleon Segment 4 without dorsal process or 



l apical spines 3. P. afflnis p. 128 



1. P. microphth.alina 0. Sars 1896 P. m., (0. Grimm in MS.) G. 0. Sars 

 in: Bull. Ac. St.-Pctersb., ser. 5 r.4 p. 428 t. 2 f. 1—7. 



Back not broad. Pleon segment 4 dorsally raised at apex with 2 denticles 

 (spines?) at top and a spinule on each side. Head," lateral corners narrowly 

 rounded. Side-plates and pleon segment 3 as in P. aflinis (p. 128). Eyes small, 

 iiTegularly oval, pigment light. Antenna 1, flagellum subequal to peduncle, 

 9-jointed, accessory flagellum 3-jointed. Antenna 2, last 3 joints of peduncle 

 thick, hirsute, flagellum 9-jointed. Gnathopod 1 with much shorter palm 

 than in the other 2 species. Gnathopod 2, palm transverse, not as in the 

 other 2 species produced to a thumb-like promioence. Peraeopod 5, 2^ Joint 

 longer than rest of limb, moi»e regularly rounded oval than in the other 

 2 species, with which the uropods and telson agree. L. ( Q ?) 6 mm. 



Caspian Sea. Depth 144-162 m. 



