19(> Steiiothoe 



is the larger. Feraeopod 3, 2^1 Joint not expauded. Colour bright yollow; 

 in the young pale bluish. L. 12-5 mm. 



Fundy Bay (Grand Manan). Depth 53 m. 



7. S. monoculoides (Mont.) 1815 Cancer (Gammarus) m., Montagu in : Tr. 

 Linn. Soc. Londou, u 11 p. 5 t. 2 f. 3 | 1828 G. m., G. Johnston in: Zool. J., u3 p. 170 | 

 1856 Montagua m., Bäte in: Rep. Brit. Ass., 3Ieet. 25 p. 57 | 1869 ProboUum m., A. JVl. 

 Norman in: Rep. Brit. Ass., Meet. 38 p. 273 | 1871 Stenothoe m., A. Boeck in: Eorh. 

 Selsk. Christian., 1870 p. 140 | 1892 S. m., G. O. Sars, Crust. Norway, v. 1 p. 240 t. 82 

 f. 1 I 1893 S.m. (part.), A. DellaValle in: F. Fl. Neapel, «.20 p. 568 t. 58 f. 79 i 1881 

 ProboUum tergestinurn, Nebeski in: Arb. Inst. Wien, v.3 p. 143 t. 13 f. 39. 



Back broad. Head scarcely produced in front, lateral corners obtiisely 

 angular. Side-plate 4 larger than 2^ and 3'^ combined. Pleon segment 3, postero- 

 lateral angles somewbat produced. Eyes small, round, dark red. Anteunae 1 and 2 

 subequal, rather short and stout. Antenna 1, flagellum of 12 very distinc-t 

 joints, longer than peduncle. Antenna 2, ultimate Joint of peduncle longer than 

 penultimate, flagellum 10-jointed, longer than peduncle. Maxillipeds, Joint 

 supporting the palp large and laminar, palp rather short and stout. Gnathopods l 

 and 2 similar in the 2 sexes, also similar to one another in structure, not in 

 size, 4*^ and 5* joints short, 5*^ distally wide, 6* oblong quadrangular, palin 

 well defined, nearly transverse in gnathopod 1, more oblique in the larger 

 gnathopod 2. Peraeopods 1 — 5 slender throughout, except for expandod 

 2"^ Joint in 4*^^ and 5*^. Uropod 3, peduncle very short and broad, with 

 3 sti'ong spines, each Joint of ramus about equal to it in length. Telson 

 oblong oval, without spines, apex evenly rounded. Colour whitish with 

 orange-red blotches about middle; ova in pouch dark bluish. L. Q 3 min. 



North-Atlantic, North-Sea, Skagerrak and Kattegat (Norway, Denmark, France, 

 Great Britain); Black Sea. Littoral, araong Algae. 



8. S. doUfusi Chevreux 1887 S. d., Chevreux in: Bull. Soc. zool. France, r. 12 

 p. 327, 297 f. 1891 S. d., Chevreux in: Bull. Soc. zool. France, r. 16 p. 260 f. 6 10 | 

 1893 S. d., A. DellaValle in: F. Fl. Neapel, ».20 p. 570. 



Head, lateral angles rounded, little produced. Body compressed. Side- 

 plate 4 as wide as 2"^ and 3*^ combined, bind margin truncate. Eyes round. 

 Antenna 1 long, 1^* Joint rather longer than 2*1, flagellum with 15 long slender 

 joints. Antenna 2 rather shorter, ultimate Joint of peduncle much shorter than 

 penultimate, flagellum 10-jointed, nearly as long as peduncle. Gnathopod 1, 

 4*^^ and b^^^ joints rather long, side by side, 6*^^ oval, subequal to 4*^ or a little 

 longer. Gnathopod 2, 4*^^ and 5**^ joints subequal, not elongate, 6*^ in <5 very long 

 and narrow, bind margin densely hirsute, ending in 3 coarse teeth or tuberclos; 

 the finger almost as long as the 6*^ Joint, with cilia on the concave margiii, 

 the apex cleft; in 9 the 6*^ Joint is broader and less long, the bind margin 

 not very hirsute, with 2 tubercles following an excavation; the finger shortei" 

 than in d, smooth and apically pointed. Peraeopods 1 — 5 long and very 

 slender, 2^ Joint of peraeopods 4 and 5 less expanded than usual and witii 

 the bind margin almost sti'aight. Uropod 3, peduncle much shorter than 

 the spinöse ramus. Telson long, with 3 spines on each side. L. 3 mm. 



Mediterranean (Cannes); North-Atlantic (Azores). Deptli 130 m. 



9. S. tenella 0. Sars 1882 S. t, G. 0. Sars in: Forh. Selsk. Christian., nv. 18 

 p. 88 t. 3 f. 12 I 1892 S. t., G. 0. Sars, Crust. Norway, v. 1 p. 238 t. 81 f. 2 j 1893 ,S. f.., 

 A. DellaValle in: F. Fl. Neapel, ?). 20 p. 570. 



