590 Microdeutopus 



defined by a small tooth, and sometimes carrying a submedian one, finger 

 matching palm. Gnathopod 1 in 9, 2^ Joint not expanded, 5*^ shorter than 6*^, 

 6^^ oblong but with rather oblique palm defined by a palmar spine and 

 overlapped by tinger. Gnathopod 2 in 9 similar to gnathopod 1 but smaller^ 

 and the finger not overlapping the palm. Peraeopods 1 — 5 slender, little 

 armed; 2^ Joint in peraeopods 3 — 5 naiTowly oval, üropods 1 and 2, rami 

 slender, with few spines. Uropod 3, rami equal, a little shorter than peduncle. 

 Telson nearly as broad as long, tapering to a truncate apex, the lateral pro- 

 cesses little marked. Colour yellow, with large blotches of violet-brown on 

 peraeon (Chevreux), front part of peraeon wine-red or grey or yellowish, eggs 

 emerald green (Della Valle). L. 3 — 4 mm. 



North- Atlantic (South-East of Brittany); Bay of Naples. Depth 10 — 20 m. 



3. M. gryllotalpa A. Costa 1853 M. g., A. Costa in: ßend. Soc. Borbon., 

 n. ser. v. 2 p. 178 | 187H M. g., A. Boeck, Skand. Arkt. Amphip., v. 2 p. 565 t. 29 f . 6 | 

 1884 M.g., H. Blane in: N. Acta Ac. Leop.. v.il p. 75 t. 9 f. 82— 90 | 1893 M. g., A. 

 Della Valle in: F. Fl. Neapel, v. 20 p.411 t. 1 f. 12; 1. 11 f. 25— 43 | 1894 M.g., G. 0. 

 Sars, Crust. Norway, v. 1 p. 543 t. 192 f. 2 | 1859 Autonoe grandimana, R. M. Bruzelius 

 in: Svenska Ak. Handl., n.ser. i;. 3 nr. 1 p.26 1. 1 f. 5 I 18()2 Microdeutopus grandimanus. 

 Bäte, Cat. Amphip. Brit. Mus., p. 378 j 1873 M. minax, (S. I. Smith in:) A. £. Verrill 

 in: Rep. U.S. Fish Comm., v.l p. 562 | ?1885 Amphithoe salenskii, J. V. Carus, Prodr. 

 F. Medit., v. 1 p. 396. 



Body moderately robust. Head without rostrum, lateral lobes blunt, 

 scarcely projeeting. Side-plates shallow, 1^* moderately produced in ö. 

 Pleon Segment 3, postero-lateral corners bluntly quadrate. Eyes small, 

 round, dark (Sars), or whitish grey (Della Valle). Antenna 1 considerably 

 more (Sars; Della Valle: less) than half as long as body, 2"^ Joint rather 

 longer than 1^*, 3* about Vg as long as 2^, flagellum longer than peduncle, 

 10 — 22-jointed, accessory flagellum 1- or 2-jointed. Antenna 2 much shorter, 

 ultimate Joint of peduncle as long as penultimate, rather longer than 6- or 

 7-jointed flagellum. Gnathopod 1 in cJ massive, 2^ Joint widening from 

 narrow neck, b^^ exti-emely large, broad oval, armed with 4 teeth successively 

 larger inwards toward base of 6*^ Joint, which is about 7* ^^^ size of 5*^, 

 somewhat oblong, but narrowing distally, with sinuous hind margin forming 

 2 or 3 iri'egular lobes, finger strong, seiTate; teeth of 5*^ Joint variable: 2 — 5. 

 Gnathopod 2 in d, 2^ Joint strongly dilated, except at the extremities, 5*^ 

 and 6*^ joints long and narrow, setose, palm and finger very small. Gnatho- 

 pod 1 in 9 , 2^ Joint not expanded, 5*^ rather robust, shorter than oblong 

 6*^, palm rather oblique, ill-defined, overlapped by finger. Gnathopod 2 

 in 9, 2* Joint not expanded, otherwise nearly as in d, but smaller. Peraeo- 

 pods 1 — 5 slender, 2^ Joint in peraeopods 3 — 5 not greatly expanded, oblong 

 in 3^, long oval in 5*^. Uropod 3, rami subequal to peduncle, inner rather 

 the shorter. Telson rather longer than broad, apex convex (Sars in figure), 

 or broader than long, apex concave (Della Valle), with 2 or 3 setules on each 

 side of apex. Colour, densely variegated with dark brown. L. 4 — 8 mm. 



North-Atlantic with adjoining seas (Europe, from Norway to Venice (not all 

 localities to be trusted); East of United States of America). 



4. M. stationis Della Valle 1881 M. gryllotalpa (err., non A. Costa 1853!), 

 Nebeski in: Arb. Inst. Wien, v.3 p. 155 t. 13 f. 41 | 1880 M.g., Sowinski in: Mem. Soc. 

 Kiew, V.6 p. 128 t. 5 f. 17a— d | 1893 M. stationis, A. Della Valle in: F. Fl. Neapel, 

 u20 p.415 t. 5 f. 2, t. 10 f. 31— 41 i 1895 M. s., Sowinski in: Mem. Soc. Kiew, v.U 

 p.237 t.4 f. 1—6 I 1898 M. s., Sowinski in: Mem. Soc. Kiew, v. 15 p.480. 



