Unciola, Siphonoecetes 681 



seta and indicated as the inner ramus by a constriction on each side, but 

 without line of demarcation ; outer ramus tipped with setae, broader than 

 long, reaching apex of inner, or (Chevreux & Bouvier) about as broad as 

 long, reaching apex of the inner. Telson round. L. about 8 mm. 



North-Atlantic with adjoiDing seas (England, France, Spain). 



7. U. petalocera (0. Sars) 1876 Glauconome planipes? (err., nou Unciola p., 

 A. M. Norman 1867!), G. O. Sars in: Arch. Naturv. Kristian., ?;. 2 p. 360 | 1879 G. peta- 

 locera, 0. O. Sars in: Arch. Naturv. Kristian., v.4 p. 462 | 1885 Unciola p., G. 0. Sars 

 in: Norske Nordhavs-Exp., u6 Crust. I p. 212 t. 17 f. 5a— 1 | 1889 U. p., J. Bonnier in: 

 Bull. sei. France Belgique, v. 20 p. 396 j 1894 U. p., G. O. Sars, Crust. Norway, v. 1 p. 619 | 

 1893 U. irrorata (part.), A. Della Valle in: F. Fl. Neapel, «.20 p. 338. 



Body slender and in general much resembling ü. planipes (p. 679). Head 

 truncate in front, without distinct rostrura, lateral corners acute. 8ide-plates 

 1—4, front Corner acute, and in side-plate 1 prolonged. Pleon segment 3, 

 postero-lateral corners acute, rather strongly produced. Eyes not visible. An- 

 tenna 1 slender, elongate, 2^ Joint longer than 1^*, and fully thrice as long as 3*^, 

 flagellum about as long as peduncle, 20-jointed. accessory flagellum 2-joiuted. 

 Antenna 2 in d, antepenultimate Joint of peduncle greatly expanded (in Q 

 not), lower distal end rounded and rather strongly produced, penultimate 

 strongly expanded, lamellate, narrowing distally; flagellum a little longer 

 than ultimate Joint of peduncle, with 9 joints (or in figure of ö about 16). 

 Gnathopod 1 in d, 6*^^ Joint very broad and strongly compressed, with 2 

 deep cavities in the palm, which is defined by an obtuse angle; finger 

 remarkably long, falciform, its apex nearly reaching the 4*^^ Joint. Gnatho- 

 pod 1 in 9 , 6^'^ Joint piriform; palm faintly incurved, very oblique, indistinctly 

 defined from the short bind margin; finger closing between 2 sets of palmar 

 spines. Gnathopod 2 rather feeble, setose, 5*^ Joint a little shorter than 

 6*^, which is subrectangular, palm nearly transverse; finger small. Peraeo- 

 pods 1 — 5 slender, 1^* — 3*^ subequal, 4*^ and 5*^ considerably longer. Peraeo- 

 pods 3 — 5, 2*1 Joint linear, not setose. Uropods 1 and 2 nearly as in U. planipes. 

 Uropod 3, peduncle produced within to a pointed lobe, canying a Single 

 spine; inner ramus not indicated, outer narrowly oval, produced beyond 

 inner process of peduncle, fringed with setules. Telson semi-elliptical, with 2 

 Short apical bristles. Colour whitish. L. 10 mm. 



North-Atlantic (lat. 63—75« N.). Depth 658—1237 m. 



8. U. incerta Bonnier 1896 U. i., J. Bonnier in: Ann. Univ. Lyon, i;. 26 p. 666 

 t. 40 f. 4. 



9 . Resembling in general U. crenatipalma. Eyes wanting. Antenna 1, 

 1^* Joint of peduncle armed below with double row of spinules, 2^ not quite 

 twice as long as 3"^; accessory flagellum with 3 joints, P* and 2^ equal, 

 'S^ nodiform. üropod 3, peduncle broadly produced ön inner side, armed at 

 apex with a spine and 2 setae; inner ramus not indicated, outer small, not 

 reaching end of process of peduncle, apex truncate, armed with 2 spines 

 and 8 setae. L. about 5 mm. — <S unknown, 



Bay of Biscay. Depth 180 m. 



10. Gen. Siphonoecetes Kr0yer 



1845 Siphonoecetes (Sp. un.: S. typicus), Kreyer in: Natnrh. Tidsskr., ser. 2 v..l 

 p 481, 491 I 1876 S., A. Boeck, Skand. Arkt. Amphip., v.2 p.630 | 1888 S., T. Stebbing 

 in: Rep. Voy. Ohallenger, t\ 29 p. 212 1 1893 S., A. Della Yalle in: F. Fl. Neapel, i'. 20 

 p. 357 I 1894 S., G. 0. Sars, Crust. Norway, v. 1 p. 609 | 1857 Siphonocetus, Bäte in: 



