684 Siphonoecetes 



Antenna 2 about as long as body, ultimate and penultimate joints of peduuele 

 subequal or ultimate the shorter; flagellum shorterthan ultimate Joint of peduncle, 

 with 3 joints, the last 2 veiy small. Gnathopod 1, 6*** Joint about as long as ö^h, 

 conically tapering, bind margin armed with 3 strong spines. Gnathopod 2 rather 

 strong; 2^ Joint rather short and thick, 4*^' produced to obtuse setose 

 prominence, o*^ having on its narrow lobe a stout spine and several setae, 

 6*^ large, oblong oval, bind margin armed with 6 spines, larger as they 

 approach the short, not very oblique palm. Gnathopods 1 and 2 of the 

 very same structure in the two sexes (Sars), gnathopod 2 in 9 more slender 

 tbau in the ö (Smith). Peraeopods 1 and 2, 4^^ Joint very large and 

 expanded, nearly cordiform in outline. Uropod 1 (in tigure), peduncle spinöse ou 

 outer, not on distal margin, outer ramus ^j^ as long as peduncle, with 11 spines 

 on straight outer margin, inner ramus much shorter. üropod 2 with a 

 spine-fiinged, distal lobe, outer ramus not much shorter than peduncle, 

 fnnged with spines on outer margin. üropod 3, peduncle expanded inside 

 to a broad setiferous lobe; ramus more than half as long as peduncle, 

 obliquely truncate apex with 1 spine and 7 setae. Colour greyish white, varied 

 with yellowish brown, antenna 2 with yellow and brown bands. L. 4 — 8 mm. 



North-Atlantic, Korth-Sea and Skagerrak (South- and Wcst-Norway. depth 

 11 — 37 im; Shetland Isles, depth 73 — 164 m; Firth of Forth; Vineyard Sound and Buzzard 

 Uay); Kattegat. 



4. S. dellavallei Stebb. 1893 S. iypicus (part.), A. Della Vallc in: F. Fl. 

 Neapel, r.20 p. 358 t. 4 f. 11— 13, t. 7 f. 23-28 | 1899 S. deüavallei, T. Stebbing in: 

 Ann. nat. Hist., ser. 7 ü. 3 p. 241, 350. 



DiflFers from S. pallidus (p. G83) in having a well developed acute rostrum 

 and the eyes well developed, dark in spirit, but conspicuous from their abundant 

 white pigmeut. Antenna 1 scarcely reaching ultimate Joint of peduncle of 

 antenna 2; flagellum less than half as long as peduncle, with 5 joints. the 

 last minute. Antenna 2, ultimate Joint of peduncle shorter than penultimate. 

 Side-plate 1 rather blunt in front. Appendages in general little different 

 from those of S. pallidus. Colour yellowish white with patches of brown, 

 antennae annulate with white and brown. L. 5 — 6 mm. 



Constructing free tubes. 



Bay of Naples. Depth 10 — 20 ra, on fine sand. 



5. S. sabatieri Rouv. 1894S.S., Rouvillein: C.-H.Ass. Frange, Sess. 23 jj. 1 p. 173. 

 In general agreement with S. colletti (p. 683), except as to uropods 1 — 3. 



Uropod 1, peduncle much longer tli an rami, not obviously spinöse on outer margin, 

 but closely fringed with spines on distal border; outer ramus not much longer 

 than inner, with 6 or 7 spines along cönvex outer margin. Uropod 2, peduncle 

 as in uropod 1; rami slender, outer rather the longer, about half as long 

 as peduncle; both rami smooth except for 2 apical spines. Uropod 3, peduncle 

 expanded on inner side to a narrow setiferous lobe; ramus not half as long 

 as peduncle, little more than a cylindrical tubercle, tipped with a couple of 

 setae. In peraeopods 1 and 2 the 2*^ Joint is very largely expanded, and 

 in peraeopods 3 and 4 the bulbous 5**^ Joint appears to be scabrous all over. 

 L. slightly under 4 mm. 



Gulf of Lion (Etang de Thau). In small univalve shells. 



S. kröyeranus (Bäte) 1857 Siphonocetus k., Bäte in: Ann. nat. Hist., ser. 2 

 .V. 19 p. 149 1 1862 Siphonoecetes whitei (err., non Cerapus w. Gosse 1853 !), Bäte &Westwood» 

 Brit. sess. Crust., v. 1 p. 467 f. | 1862 SipJionoecetus w., Bäte. Cat. Amphip. Brit. Mus., 

 p. 270 t. 45 f. 10. 



English Channel (Weymouth). 



