114 Byblis 



the base. Telson broader than long, slightly taperiug, cleft very short. Head 

 not mottled. L. 9 12 ram. 



Arctic ücean (Lofoten Isles, Finmark, South-Spitzbergen, Barents Sea). 



5. B. affinis U. Sars 1891 B. a., G. 0. Sars, Crust. Norway, v. 1 p. 186 t. 65 

 f. 2 I 1893 Ampelisca gaimardii (part.), A. Della Valle in: F. Fl. Neapel, ?;.20 p. 907, 922. 



Corneal lenses smaller than in B. longicornis (p. 113), lower pair remote 

 from lower corners of front, pigroent dark brownish. Antenna 1 , peduncle reaching 

 end of peuultiinate Joint of peduncle of antenna 2, flagellum in o 24-jointed^ 

 twice as long as peduncle ; ultimate and penultiraate joints of peduncle of antenna 2 

 subequal; both pairs shorter than in B. longicornis. Gnathopod 1 with (5*^^ 

 Joint little shorter than 5*^, a character which this species has in common 

 only with B. serrata and B. guernei. Peraeopods 1 and 2 having 6*^^ Joint 

 considerably louger than o*^; peraeopod 5 with 2'^ Joint not produced below 

 the 4*'', front and lower edges in a continuous curve, but almost quadrate,. 

 o**^ Joint as long as o*^ and 4*^^ combined, and rather longer than the 6^'^ 

 üropod 3 lanceolate, with confronted edges slightly serrate. Telson very little 

 broader than long, very slightly tapering to the truncate distal margin, cleft 

 exteuding almost to the middle. Body pellucid with reddish iutestine, head 

 dotted Avith whitish and brownish pigment not ramified, orange patches 011 

 2*^ Joint in peraeopods 3 — 5 and on pleon. L. 9 9 mm. 



Trondhjemsfjord. Depth 75—113 m. 



6. B. crassicornis Metzg. 1875 B. c, Aug. Metzger in: Jahresber. Conim. 

 I). Meere, «.2/3 p.297 t. 6 f. 9, 9a, b | 1891 B. c, G. 0. Sars, Crust. Norway, v. 1 p. 188 

 t.66 f.l I 1893 Ampelisca gaiviaräü {pavt), A. Della Valle in: F. Fl. Neapel, v.20 p.472. 



Corneal lenses wanting. Antenna 1, peduncle reaching considerably beyond 

 penultimate Joint of peduncle of antenna 2, flagellum in Q 20-jointed, scarcely 

 twice as long as peduncle; ultimate Joint of peduncle of antenna 2 a little shorter 

 than penultimate, antenna 2 little longer than antenna 1. Peraeopod 5 with 

 2'* Joint less expanded than usual, scarcely reaching beyond the 4*'» Joint, 

 front and lower margins in a continuous curve, 5**^ Joint little longer than 4^'\ 

 not longer than 6*^. üropod 3, rami not seiTate on the confronted edges. 

 Telson fully as long as broad, much tapering, cleft nearly reaching the 

 middle. Body pellucid, nearly colourless. L. g 7 mm. 



Bukkenfjord (Jaedereu, Hvitingsö), Christianiafjord. Depth 188 — 282 m. 



7. B. guernei Chevreux 1887 B. g., Chevreux in: Bull. Soc. zool. Franoe,. 

 V. 12 p. 576. 



Corneal lenses very distinct. Antenna 1 more than '7^ length of the body ; 

 antenna 2 as long as the body, ultimate Joint of peduncle a little shorter 

 than penultimate. Gnathopod 1, 5*^> Joint a little longer than 6^^. Peraeopod 5 

 having the 2'' Joint much expanded and reaching to the end of the 5*^ Joint. 

 Telson a little broader than long, distally truncate, cleft extending to the 

 middle. L. 5 mm. 



Noi'th-Atlantic (Cape Finisterre). Depth 510 m. 



8. B. serrata S. I. Sm. 1873 B. s., (S. I. Smith in :) A. E. Verrill in : Rep. 

 U. S. Fish Comra., v.l p.561 | 1879 Anqyelisca minuticornis, Gr. 0. Sars in: Arch. Naturv. 

 Kristian., v.4 p. 455 | 1885 A. m., G. 0. Sars in: Norske Nordhavs-Exp., v.ß Crust. I 

 p. 198 1. 16 f. 5a— | 1893 A. m., A. Della Valle in: F. Fl. Neapel, t;. 20 p.477 | 1891 

 Byhlis m., G. 0. Sars, Crust. Norway, v. 1 p. 190 t. 66 f. 3. 



