592 Microdeutopua 



angle not obtuse. Side-plate 2 deepest in d, 3"^ in 9. Pleon segment 3, 

 postero-lateral corners subquadrate, not acutely. Eyes small, round, black 

 with wMtish coating. Antenna 1 % as long as body; 2*^ Joint considerably 

 lt)nger than 1^*, about thrice as long as 3*^; flagellum much longer than 

 peduncle, about 22-jointed (Bruzelius: 20 — 28), accessory flagellum 3 — 5-jointed. 

 Antenna 2 much shorter, ultimate Joint of peduncle subequal to penultimate, 

 scarcely longer than the 8-jointed flagellum. Gnathopod 1 in d, 2*^ Joint 

 not widened, having (in Sars' figure) a small denticle on upper part of front 

 margin, 5*^ very large, but much longer than broad, hind margin produced 

 to a sti'ong tooth with secondary tooth at its base outside, this being accompanied 

 by 1 or several small teeth (but only 1 in figures), 6*^ Joint narrow, with strongly 

 concave hind margin, angular near finger-hinge (Sars), or very sinuous, with distal 

 half very convex, not angular (Sowinski) ; flngOr long, sen-ate. Gnathopod 2 in d, 

 6**^ Joint as long as 5*^ scarcely so wide, narrowly oblong, palm and finger 

 very short. Gnathopod 1 in 9, 2^ Joint with smooth margins, 5^^ nearly 

 as long as 6**^, which widens a little to the slightly oblique palm, finger 

 overlapping palm. Gnathopod 2 in 9 nearly as in d, but smaller. Peraeo- 

 pods 1 and 2 slightly armed. Peraeopods 3 — 5, 2*^ Joint narrowly oblong, 

 peraeopod 5 elongate, with the usual fascicle of setae at hind apex of 6*^ 

 Joint, üropod 3, inner ramus rather the shorter, as long as peduncle. 

 Telson a little longer than broad, apex slightly angular, with 3 slender 

 spines on each side (Sars), or convex between distinctly outdrawn subacute 

 points (Sowinski). Colour whitish, sometimes with reddish finge, mottled 

 with dark brown spots in transverse bands. L. 6 — 9 mm. 



North- Atlantic (South-West-Norway, at least to Trondlijemsfjord, depth 11 — 56 m; 

 Shetlands, depth 128 — 164 m); Black Sea, depth 54 — 64 m. 



7. M. propinquus 0. Sars 1894 M. danmoniensis (err., non Lembos dam- 

 noniensis Bäte 1856!), M. propinqvus, G. 0. Sars, Crust. Norway, v.l p. 542; 1. 192 f. 1. 



Closely allied to M. anomalus (p. 591), but differing at follows. Eyes 

 rather larger, rounded oval. Antenna 1, flagellum little longer than peduncle, 

 accessory flagellum of 2 equal joints. Gnathopod 1 in d, tooth of 5*^ Joint 

 less elongate, the accessory tooth a little removed from it, 6**^ Joint with 

 hind margin less concave; gnathopod 1 in 9 less slender. 6*^ Joint con- 

 siderably longer than 5*^. Peraeopod 5 less elongate. Colour whitish, 

 mottled with dark brown. L. d 5 mm. 



North-Atlantic (Norway). Very shallow water. 



8. M. megnae Giles 1888 M. m., G. M. Giles in: J. Asiat. Soc. Bengal, v.öl 

 p. 231 t. 7 f. 1—4. 



Head without rostrum; lateral lobes obtuse, little prominent. Side- 

 plates shallow, 1^* not strongly produced, S^ deeper than 2^ or 4*^. Pleon 

 segment 3, postero-lateral corners rounded. Eyes small, rounded, black. 

 Antenna 1 about half as long as bo^y, 2*^ Joint longer than 1^*, S^ about 

 ^/a as long as 1^*, flagellum much shorter than peduncle, 10 — 14-jointed, 

 accessory flagellum very small, 1-jointed. Antenna 2 stouter than antenna 1, 

 subequal in length; ultimate Joint of peduncle as long as penultimate, longer 

 than flagellum of 10 — 12 veiy short joints. Mandible, 2*^ and 3^ joints of 

 palp subequal, neither much longer than the 1^*. Gnathopod 1 in d, 2^ Joint 

 much expanded, 5*'» massive, longer than broad, hind margin produced into 

 a slender tooth, 6*^^ Joint very short, nearly quadrangular, hii'sute, finger strong 

 and a little varicose, but otherwise unarmed. Gnathopod 2 in d short, slender, 

 imperfectly subchelate, 6*^ Joint shorter than 5**», widening (in figure) to an 



