Stcnothoe 195 



(iefined by au acute lobe within which tip of fiuger closes. Peraeopods 1 aud 2 



sk'uder. üropod 3, ramus slightly louger than peduncle. L. 9 about 6 mm. 



North-Atlantic (St. George's Banks [United States of America]). Depth 55 ni. 



4. S. antennulariae DellaValle 1893 S.a., A. DellaYalle in: F. Fl. Xeapel, 

 r.20 p. 565 t. 30 f. 1—18 \ 1896 S. crassiconiis (pari), A. O.Walker in: Rep. Brit. Ass.. 

 Meet. 66 p. 420 | 1897 S. c, A. O.Walker in: J. Linn. Soc, u26 p. 229 t. 18 f. 8— 3e. 



Body robust. Side-plate 1 very small. 4*^ large, subtriangular; depth 

 and width subequal. Eyes small, circular, rosy. Antenna 1, 1^^ and 2'^joints 

 equal in lengtli, flagellum with 7 — 11 slender joints. Anteuna 2, ultimate and 

 penultimate joints of peduncle equal, flagellum short, 6- or 7-jointed. Maxillipeds, 

 inner plates exceediugly small, outör quite wanting. palp slender. Gnatho- 

 pod 1. 2'^ Joint notably beut at the base, 4*^ not nearly reachiug apex of 

 5th^ (;th Qyfji^ rather longer than 5*^. Gnathopod 2, 4**^ and 5*^ joints short, 

 5th ^yjde clistally. 6*^ much larger in d than in 9, in d having the palm 

 defined at some distance fi'om the base by a tooth to which the long finger 

 reaches curving over another tooth or projection much nearer the hinge, 

 (this projection being subdivided in d as well as in Q: Walker); 6*^ Joint 

 in o almond-shaped, with some slight teeth at intervals over which the 

 moderately sized finger curves. Peraeopods 3 — 5, 4*^ Joint decurrent, 2*^ 

 and 4^*^ expanded in peraeopods 4 and 5. Uropod 3 with very short peduncle, 

 1*** Joint of the ramus with several spines, 2^ rather shorter, with 1 spine 

 (unless supposed 1^* Joint be in reality the peduncle, and supposed 2'' Joint 

 an indistinctly 2-jointed ramus). Telson oval, with 2 (DellaValle; 3, Walker) 

 spines on each side; apex acute. Colour pale greyish with some yellow 

 spots, ova bluish-green. L. 1"5 — 2 mm. 



Gulf of Naples (depth 50 — 80 m, on Hydroids, especially Antennularia and 

 Agiaophenia myriophyllum (L.)) ; Irisb Sea (W.-S.-W. of Calf of Man, depth 42 m). 



5. S. eattai Stebb.*) 1876 Probolium polyprion (err., non A. Costa 1853!), 

 Catta in: Ann. Sei. nat., ser. 6 ».3 nr. 1 p. 15 t. 2 f . 1 | 1893 Stenothoe valida (pari), 

 A. DellaValle in: F. Fl. Neapel, u20 p. 566 [ 1897 S. crassicornis (part.), A. O.Walker 

 in: J. Linn. Soc, i\ 26 p. 229. 



Eyes small, round, black. Antenna 1 in d rather shorter than antenna 2. 

 Antenna 1, flagellum 20 — 25-jointed; antenna 2, ultimate and penultimate 

 joints of peduncle subequal, flagellum 15 — 24-jointed, thicker than flagellum of 

 antenna 1. Gnathopod 1, 4*^^ and 5*^ joints side by side, much shorter 

 than the 6^^^ Joint, which is trapezoidal, twice as long as broad, back and 

 front margins parallel, palm oblique, finely crenulate, well defined. Gnathopod 2 

 nearly as in S. valida and S. dollfusi (p. 194, 196), 6*^ Joint with bind margiu 

 pubescent and ending in 2 apical teeth, finger cleft at the apex. Peraeopod 3. 

 2*^ Joint expressly stated to be not expanded. üropod 2 shorter than the others. 

 Uropod 3, peduncle a little longer than the ramus,' of which the 2*^ Joint 

 is geniculate. Telson twice as long as broad, produced to a little apical 

 point, 3 spines on each side, scattered hairs on the surface. L. .9 3 mm. 



Mediterranean. 



6. S. elypeata Stimps. 1853 S. c, Stimpson in: Smithson. Contr., f. 6 ur. 5 p. 51 } 

 1893 S. c, A. DellaValle in: F. Fl. Neapel, r.20 p. 569 | ?1862 S. dypeatus, Bäte, Cat. 

 Amphip. Brit. Mus., p. 61 t. 9 f. 7. 



Eyes conspicuous, red. Gnathopod 1 slender, 6^*» Joint small. Gnathopod 2, 

 (i**^ Joint very large. palm excavate between 2 teeth, of which the proximal 



*) Spec. nov. After J. D. Catta. 



18* 



