Laetmatophilus, Cyrtophium 697 



Eyes rounded, slightly protuberant, with light yellowish pigment. Antennae 1 

 and 2 about as in L. purus. Anteuna 1 about ^^ as long as body. Gnatho- 

 pod 1 as in L. purus, except 6*^^ Joint gradually widening to the palm, 

 which is not longer thau bind raargin, somewbat oblique, setose, defined by 

 an obtuse angle, sligbtly overlapped by tbe apparently not denticulate 

 finger. Gnathopod 2 in d as in L. purus, except that tbe tootb on the 

 6*^^ Joint is more acute. Gnatbopod 2 in Q , apex of 4*^ Joint raore produced 

 than in d; 6^^ Joint broad, rounded oval; palm convex, defined by a short 

 tootb; finger strong, curved, matcbiug palm. Peraeopods 1 — 5 subequal, 

 slender; 2*^ Joint mucb longer than 4*^, subequal to 6*^ which is longer 

 thau 5*^; finger sti'ong, curved. Pleopods (in Sars' figure) with 9-joiuted 

 rami. Colour yellowish. L. 4 — 5 mm. 



Arctic Ocean, North-Atlantic, !North-Sea, Skagerrak and Kattegat (Scandinaviaa 

 coasts). Depth 45—600 m. 



3. L. ariuatus (Norm.) 1869 Cyrtophium armatum, A. M. Norman in: ßep. 

 Brit. Ass., Meet. 38 p. 285 j 1888 Laetmatophilus a., Chevreux & Guertie in: C.-R. Ac. 

 Sei., V. 106 p.626 \ 1888 L. a., T. Stebbing in: Eep. Voy. Challenger, r. 29 p. 1628 | 1894 

 L. a., G. 0. Sars, Crust. Norway, v. 1 p. 632 t. 227 f. 1 | 1895 L. a., A. M. Norman in: 

 Ann. nat. Hist., ser. 6 i'. 15 p. 493 | 1871 L. spinosissimus, A. Eoeck in: Forh. Selsk. 

 Christian., 1870 p. 266 | 1893 L. tuberculatus (part.), A. Della Valle in: F. Fl. Neapel, 

 t!. 20 p. 317. 



Head with dorsal tubercle acutely produced. Peraeon segment 1 

 with 2 spiniform tubercles, one behind other, segment 2 with 1 median, foUowed 

 by 2 side by side, segments 3 — 7 and pleou segraents 1 and 2 each with 

 a transverse pair. Appendages closely agreeing with those of L. tuberculatus. 

 Colour light yellowish, transversely banded with vivid orange. L. scarcely 4 mm. 



Arctic Ocean, North-Atlantic and North-Sea (West-Norway to Lofoten Islands, 

 depth 94— 565 m; Shetland Isles, depth 180— 200 m). 



4. L. hystrix (Hasw.) 1880 Cyrtophium ? h., Haswell in : P. Linn. See. N. S. Wales, 

 V. 5 p. 104 t. 7 f. 3 I 1885 Laematophilus h., Haswell in: P. Linn. Soc. N. S. Wales, v. 10 

 p. HO I 1893 Laetmalophilustuberciilatiis (j>art.), A. Della Valle in: F. Fl. Neapel, r. 20 p. 317. 



Head, peraeon segments 1 — 7 and pleon segments 1 and 2 armed 

 with spiniform tubercles. Of these there is a median row, flanked on the 

 peraeon and perhaps also on the head by 2 lateral rows on each side; 

 lateral borders of peraeon segments 2 — 6 produced outward and upward, 

 acuminate. Side-plates with an acute point on lower margin. Appendages 

 appear in dose agreement with L. purus, but in gnathopod 1 in d the 6*^ Joint 

 is without the long row of spines at defining angle of palm. Gnathopod 2 

 in ö not observed. Gnathopod 2 in Q as in L. tuberculatus. Rami of 

 pleopods with 6 — 8 joints. üropod 1, outer ramus % ^s long as inner. 

 L. about 4 mm. 



Port Jackson and Port Stephens [East-Australia]. 



2. Gen. Cyrtophium Dana 



1852 Cyrtophium, J. D. Dana in: Amer. J. Sei., ser. 2 v.U p. 309 | 1853 C. (Sp. 

 un.: C. Orientale), J. D. Dana in: U. S. expl. Exp., v. 13 ii p. 831, 839. 



Agreeing with Podocerus (p. 700) except that antenna 1 has no 

 accessory flagellum, and the longer ramus in uropods 1 and 2 is broad 

 comparatively. 



2 accepted species, 1 doubtful. 



