Microprotopus, Photis 605 



and 2 spiiies. Telson rather broader than long, distallv truncate, with a 

 little tooth at each corner carrying 2 unequal spines. Colour sometimes 

 lilackish with crowded dark spots. L. 3 mm. 



North-Ätlantic with adjoining seas (Europe from Bergen in Norway to the 

 Adriatic; Azores). Depth 4 — 20 m, on sandy bottom. 



2. M. longimanus Chevreux 1886 & 87 M. l., Chevreux in : Bull. Soc. zool. France, 

 ».11 p.XLI; V. 12 p.311 f. 5; p. 295 t. 5 f. 5— 10 j 1890 M. L, Chevreux in: Bull. Soc. 

 zool. France, v. 15 p. 148 f. 1, 3, 5 | 1893 M. l, A. Della Valle in: F. Fl. Neapel, v. 20 

 p.392 t.56 f. 7— 12 | 1894 Mtl., G. 0. Sars, Crust. Norway, v.\ p. 566 | 1890 M. macu- 

 latus (part.), J. Bonnier in: Bull. sei. France Belgique, v. 22 p. 173 t. 8, 9. 



Side-plates 1 — 4 not strongly setiferous, 2^ in d rotundo-quadrate. 

 Pleon Segment 3, postero-lateral corners rotundo-quadrate. Eyes round, not 

 very small, red. Antennae 1 and 2 equal, nearly as in M. maculatus, 

 but flagellum of antenna 1 only 5-jointed, flagellum of antenna 2 only 

 3-jointed, scarcely as long as ultimate Joint of peduncle. Gnathopod 1 

 nearly as in M. maculatus. Gnathopod 2 in d. 3*^ Joint shorter than 4*^, 

 4*^ with simple setae on the produced rounded apex, 5**^ cup-shaped, with 

 long plumose setae on the bind lobe, 6*^ very large, subrectangular, front 

 margin nearly straight, the opposijie one, of which the chief part is palmar, 

 armed according to age with 1 — 3 strong teeth, linger reaching the tooth 

 nearest the base of the 6*^ Joint. Gnathopod 2 in 9 , 4*^ and 5*^ joints 

 broader apically than in d, 6*^ much narrower than 5^^, long, tapering, 

 smooth, caiTying in front some long plumose setae; finger curved, much 

 shorter than 6^^ Joint. Peraeopods and uropods differing little from those 

 of M. maculatus. Telson apically rounded. Colour yellowish with transverse 

 brown bands. L. 2 mm. 



North- Atlantic (Croisic [West-France], Pas-de-Calais). On algae (Rhodomela 

 pinastroides Ag.) on rocks at low-tide, or rocky bottom. 



M. emissitius (Dana) 1852 Gammarus e., J.D.Dana in: P. Amer. Ac, v.2 

 p. 211 I 1853 & 55 Dercothoe e. (part.), J. D. Dana in: U. S. expl. Exp., v. 13n p.969; 

 t. 66 f. 9a— e | 1862 Dercothoe (Cerapus) e., Dercothoe emistiiis, Bäte, Cat. Amphip. Brit. 

 Mus., p. 259 t. 44 f. 7 | 1893 Protomedeia maculata (part.), A. Della Valle in: F.Fl. 

 Neapel, v. 20 p. 387, 436. 



L. 8 mm. 



Sooloo Sea. Depth 12 m. 



M. hirsuticornis (Dana) 1852 Gammarus h., J.D.Dana in: P. Amer. Ac, 

 v.2 p. 210 I 1853 & 55 Dercothoe? h., J. D. Dana in: U. S. expl. Exp., v. 13u p.972; 

 t. 67 f. 2 ! 1862 Dercothoe (Cerapus) h., Bäte, Cat. Amphip. Brit. Mus., p. 260 t. 44 f. 9 | 

 1893 Protomedeia maculata (part.), A. Della Valle in : F. Fl. Neapel, v. 20 p. 436. 



Bay of Rio Janeiro. 



M. minutus Sowinski 1894 M. m., Sowinski in: Mem. Soc. Kiew, v. 13 p. 329 

 t. 4 f. 1—15 1 1898 M. m., Sowinski in: Mem. Soc. Kiew, v. 15 p.470. 



The description of this species could not be obtained. 



Sea of Azov. 



2. Gen. Photis Kr0yer 



1842 Photis (Sp. un.: P. reinhardi), Kr0yer in: Naturh. Tidsskr., vA p.l55 | 1876 

 P., A. Boeck, Skand. Arkt. Amphip., v.2 p. 553 | 1888 -P., T. Stebbing in: ßep. Voy. 

 Challenger, v.29 p. 1063 j 1893 P., A. Della Valle in: F. Fl. Neapel, r. 20 p. 394 | 1894 



