21*2 Halirages 



flagellum about equal; ultimate joiut of pedimcle rather shorter thau peii- 

 ultimate, flagellum eveuly tapering, with 56 joiuts, some of tlie proximal having 

 as many as 6 calceoli, and the last 3 joints of peduncle having 2 or 3 

 rows of them. Mandible, 3*^ Joint of palp veiy spinöse, scarcely as long 

 as 2^. Maxillipeds, outer plates with smooth inner margin. fringed with 

 subraarginal spine-like setae. Gnathopod 1, 5*^ Joint shorter and narrower 

 than 6*^, 6*'^ oval, narrowest at hinge of finger, palm very oblique and 

 ill-defined. Gnathopod 2 similar, but rather longer, not wider. Peraeo- 

 pods 1 — 5 not especially slender, finger short, curved. Peraeopod 5. 2*^ Joint 

 somewhat piriform, much larger than in peraeopods 3 and 4. Uropods 1 

 and 2 with few marginal spinules, each with a stout apical spine, outer ramus 

 shorter than inner; uropod 3, rami subequal, about twice as long as peduncle, 

 lanceolate, with several spinules and setae. Telson longer than peduncle 

 of uropod 3, more than twice as long as its greatest breadth, sides a little siuuous, 

 not stroügly tapering, apex triangulai'ly notched. L. 22*5 mm. 



South-Atlantic (Stanlej^ Harbour [Falkland Islands], lat. 52" S., froni kelp; 

 Hennit Island, lat. 56*'S.); Strait of 3Iagellan. 



4. H. quadridentatus O. Sars 1876 H. qvadrideiüatus, G. O. Sars in: ArcJi. 

 Xaturv. Kristian., v.2 p. 257 | 1885 II. q., G, 0. Sars in: Norske Nordhavs-Exp., «;. 6 

 Crust. I p. 172 t. 14 f. 4ii, 4a— f i 1893 Acanthozone quadriäentata (part), A. Della 

 Valle in: F. Fl. Neapel, i;.20 p. 611 t. 59 f. 22 | 1882 Halirages clegans, A. M. Norman 

 in: P. R. See. Edinb., «.11 p. 688. 



Peraeon segments 6 and 7 and pleon segments 1 and 2 each produced 

 into a dorsal adpressed tooth. Head, rosti-um obsolete, lateral corners narrowly 

 rounded, post-antennal produced to an acute deflexed lobe. Side-plates 1 — 4 

 described as simple rounded, and finely serrate along the lower margin 

 (but Sars fig. 4d shows side-plate 1 with an acute front angle, in accordance 

 with Norman). Pleon segment 1, postero-lateral angles rounded, in segments 2 

 and 3 quadrate, in segment 3 lateral margin above the angle slightly arcuate. 

 very finely crenulated. Eyes very large, irregulär oval, almost meeting 

 above, brilliant red. Antenna 1 as long as body, 3^ Joint of peduncle very 

 Short, flagellum 5 times as long as peduncle, joints uumerous, short, except 1***. 

 Antenna 2 considerably longer, ultimate and penultimate joints of peduncle 

 subequal. Mandible, 3'^ Joint of palp rather shorter than 2*^. Gnathopods 1 

 and 2, 5*^ Joint slender, considerably longer than 6*^, 6*^ oblong, little 

 widened distally, palm short, scarcely oblique. Peraeopods 1 — 5 very slender, 

 1^* and 2*^ almost filiform, 3^ — 5*^^ with 2^ Joint piriform, produced at lowor 

 bind Corner to a sharp point. üropods 1 and 2, outer ramus much shorter 

 than inner; uropod 3, outer ramus little shorter than inner, both long, 

 lanceolate, with pectinate edges. Telson reaching beyond peduncle of uropod 3, 

 twice as long as broad, triangulär, apex tridentate, central tooth the largest, 

 but all 3 small. Colour whitish, translucent, with a few faint red bands. 

 L. 25 mm. 



North-Atlanüc (West-Norway, depths 659 and 960 m; lat. 60« N., long. 6» W., 

 depth 988 m). 



H. batei (R. 0. Cunningh.) 1871 Ätylus? b., R. 0. Cunningham in: Tr. Linn. 

 Soc. London, ??. 27 p. 498 t. 59 f. 9 ! 1888 Halirages huxlcyanus?, T. Stebbing in: Rep. 

 Voy. Challenger, v. 29 p. 902. 



L. 16 mm. 



Strait of Magellan (Possession Bay). 



