Cheirocratus 419 



the 2^ Joint distally a little tapering. üropod 3, peduncle long, more than 

 half as long as rami. Telson about % as long as peduncle of uropod 3, cleft 

 rather wide, ^1^ of length. apices obliquely truncate from within outward, armed 

 with 3 unequal spines. Colour orange, mottled with rose-red; golden yellow, 

 mottled all over with small red specks, an opaque whitish patch on front 

 part of peraeon; Segments and side-plates spotted with scarlet, margins of 

 antennae 1 and 2 and basal Joint of legs scarlet. L, 8 — 10 mm. 



Arctic Oceaii and North-Atlantic with the adjoiuing seas (Europe from Lofoten 

 Isles round to Naples and Constantinople). Depth — 112 m. 



2. C. intermedius 0. Sars 1894 C. i., G. 0. Sars, Crust. Norway, v. 1 p. 527 

 t. 186 f. 1 I 1896 C. L, T. Scott in: Kep. Fish. Board Scotl., v. 14 p. 160 t. 4 f. 7. 



Closely resembling C. sundevallii. Head, lateral lobes slightly constricted 

 at base, post-antennal corners projecting beyond thera. Side-plate 1 little 

 expanded distally, 2*^ in ä much deeper. Pieon segment 3, postero-lateral 

 corners acutely and considerably produced. Antenna 1, flagellum subequal 

 to peduncle. Gnathopod 2 in d, e*'^ Joint very large, tumid at base, 

 palm oblique, longer than hind margin, concave, densely setose, defined 

 by an obtuse prominence with a bifid denticle and 2 others, having also 2 

 distant submarginal denticles, and near the linger-hinge 2 or 3 prominent 

 tubercles, finger cürved, shorter than palm and impinging upon its edge, 

 not closing against the surface of the Joint, üropod 3 long, rami little longer 

 than peduncle. Telson scarcely longer than broad, cleft wide, apices armed 

 with 5 spines, 1 longer than the rest. Colour pale yellow with irregulär 

 patches of vivid carmine. L. (5 reaching 11 mm. 



North-Atlantic and North-Sea (South- and West -Norway up to the Trond- 

 hjemsfjord, in moderate depths; Firth of Forth). 



3. C. robustus 0. Sars 1894 C. r., G. 0. Sars, Crust. Norway, v. 1 p. 526 

 t. 18.5 f. 2. 



Very like C. sundevallii. Body comparatively stouter, with side-plates 

 smaller, 2*^ in ö only a little deeper than the others, pleon segment 3 with 

 postero-lateral corners rather more produced. Antenna 1 as long as peduncle 

 of antenna 2, flagellum longer than peduncle, 22-jointed. Antenna 2, 

 ultimate and penultimate joiuts of peduncle subequal. Gnathopod 1, 6^'^ Joint 

 as long as 5***. Gnathopod 2 in d, joints short except 6*^', which is very 

 large, tumid, ovate, inner face densely clothed with short setae, palm on 

 inner surface, slightly concave, armed with 1 tubercle to meet point of 

 finger. Peraeopods 3 — 5 strongly built, especially in ö, peraeopod 5 much the 

 strongest, 4**^ — 6*^ joints broad, compressed, linger small. Telson broader 

 than long, 5 not very unequal spines at each apex. Colour pale yellow 

 with small red spots. L. ö nearly 10 mm. 



Christianiafjord and Trondhjemsfjord. Moderate depths. 



4. C. assimilis (Lilj.) 1851 Gammarus a., W. Liljeborg in: Öfv. Ak. Förh., 

 v.S p. 23 i 1871 Cheirocratus a., A. Boeck in: Forh. Selsk. Christian., 1870 p. 214 | 1876 

 C. a., A. Boeck, Skand. Arkt. Amphip , v.2 p. 398 t. 24 f. 3 \ 1889 C. a., A. M. Norman 

 in: Ann. nat. Hist., ser. 6 vA p. 129 t. 10 f. 13; t. 11 f. 11 | 1893 C. a., A. Della Valle 

 in: F. Fl. Neapel, ^.20 p. 688 t. 20 f. L 2, 5— 23, 26, 28, 29 | 1894 Ca., G. O. Sars, 

 Crust. Norway, v. 1 \). 528 t. 186 f. 2 | 1867 C. mantis, A. M. Norman in : Nat. Hist. Tr. 

 Northumb., v. 1 p. 13 t. 7 f. 14, 15. 



Body as in C. intermedius, post-antennal corners of head even more 

 produced, postero-lateral angles of pleon segment 3 rather less. Gnathopod 2 



