Bathymedoii, Monoculopsis 257 



thnu the long fingen Peraeopod 5 (Fig. 64) slender, unusually long, veiy 

 fragile, 2*^ Joint broad oval, 5^^ longer than 6*'', 6*'» than 4*''. üropod 3, 

 peduncle longer than -rami, inner ramus with dense row of minute spinules 

 on inner margin. Telson sraall, as broad as long, rounded quadrangular, 

 apical border insinuate. Colour pale yellowish, peraeon transversely banded 

 with faint whitish stripes. L. 9 5 mm. 



Skagerrak, North-Sea and North-Atlantic (Christianiafjjrd to Trondhjemsfjord). 

 Depth 94—564 m. 



3. B. longimanus (Hoeck) 1871 Halimedon l., A. Boeck in : Forh. Selsk. Christian., 

 1870 p. 170| 1876 H. l, A. Boeck, Skand. Arkt. Amphip., v.2 p. 284 t. 13 f . 6 | 1883 

 H. l, .1. S. Schneider in: Tromse Mus. Aarsh., v.% p. 34 t. 3 f. 16 | 1893 H. l., A. Della 

 Valle in: F. Fl. Neapel, «.20 p. 538 t. 58 f. 3H, 37 | 1892 Bathymedon l, G. O. Sars, 

 Crust. Norway, v. 1 p. 333 t. 117. 



Body rathei' slender and compressed, thin-skinued. Sraall acute rostrum 

 reaching about middle of 1®* Joint of anteuna 1. 1^* side-plate distally ex- 

 panded and produced, b^^ broad. I]yes represented by chalky white pigmeut 

 irregularly distribiited within head and front of peraeon. Antenna 1, 2'^ Joint 

 longer than 1^*, flagelliira in 9 short, with 10 joints, in d longer, with 

 22 setose joints. Antenna 2 in , ultiraate and penultimate joints of peduncle 

 subequal, together as long as flagellum, in d ultiraate rather longer than 

 penultimate, flagellura filiform, elougate. Maudible, 2*^ Joint of palp slightly 

 arcuate. Maxillipeds, outer plates not reaching apex of 2^^ Joint of palp. 

 Gnathopod l, 5*^ Joint with short broad distal expansion, 6*^ rather shorter, 

 oval, palm longer than bind margin, defined by a long spine. Gnathopod 2 

 rauch more slender, 5*^ Joint scarcely at all expanded. elongate, 6*'^ Joint rauch 

 shorter, palm twice as long as bind margin, defined by a spine. Peraeo- 

 pods 1 — 4 setose, finger longer in peraeopods 1 and 2 than jn peraeopods 3 

 and 4. Peraeopod 5, 2<^ Joint large, piriform, 5*'' shorter than 4**", 4*^ than 6'^. 

 üropod 3, peduncle stout, rami rather longer, spinuliferous. Telson scarcely 

 as long as breadth at base, narrowing to somewhat emarginate apical border. 

 Colour pale yellowish; ova yellowish. L. 6 ram. 



Arctic Ocean, North-Atlantic, Xorth-Sea and Skagerrak (South- and West-Norway 

 northward to Lofoten Isles). Depth 94 — 376 m. 



4. B. aeutifrons Bonnier 1896 B. a., J. Bonnier in: Ann. Univ. Ljon. ??. 26 

 p. 643 t. 38 f. 2. 



Nearly akin to B. longimanus. Rostrum very sraall, acute. Side-plate 1 

 distally expanded and produced, 5**^ broad. Eyes and ocular pigment entirely 

 wanting. Antenna 1, 1^* and 2^^ joints equal, 3*^ very short, flagellum multi- 

 articulate. Antenna 2 in d rauch longer, ultiraate aud penultimate joints 

 of peduncle subequal, long. Mandible, 2'^ Joint of palp not arcuate. Maxillipeds, 

 outer plates not reaching apex of 2*^ Joint of palp. Gnathopods 1 and 2 as 

 in B. longimanus. Peraeopods 1 — 5 also nearly as in tliat species, but differing 

 by having in peraeopods 1 — 4 a rather bluntly lanceolate, instead of an 

 arcuate finger. Telson quadrangular oval, with a couple of long setae near 

 the lower angies, apical margin slightly concave. L. ö 5 mm. 



Bay of Biscay. Depth 950 m. 



16. Gen. Monoculopsis 0. Sars 



1^22 Monoculopsis (Sp. im.: M. hngicornis), G. 0. Sars, Crust. Norway, v.l p.310. 



Head produced to a short obtuse rostrura. Side-plates 4 and 5 in 9 very 



large. Eyes contiguous within the front of head. Antenna 1 in 9 longer than 



Das Tierreich. 21. Lief.: T. R. R. Stebbing, AmphipoJa I. 17 



