Saiicho, Aniphithopsis 289 



rotimdu-quadrate 6*^^, which has the front luargiu straight, the liinder curved, 

 sliglitly crenulate, palm broad, almost transverse, divided into 3 or 4 irre- 

 gulär teetb, fiiiger smooth. curved, closing down into a pocket excavate in 

 thickness of 6*^ Joint; in the O 5*^' and 6*^^ joints almost as in gnatho- 

 pod 1. feeble, but ratber more elongate. Peraeopods 1 — 5, 4**^ Joint a 

 little widened and produced, tinger small, with spinule on inner margin. 

 Peraeopods 1 and 2 ratber sbort; peraeopod 3, 2*^ Joint tending to oval; 

 peraeopods 4 and 5, 2'^ Joint more oblong, fringed on both margins with 

 long setae, bind margin nearly straight, produced downward, especially in 

 peraeopod 5, which bas numerous spines and spinules on the narrow, 

 olongate. subequal 5* and 6^'! joints. üropod 2, peduncle as long as in 

 iiropod 1 and rami longer than in uropod 1. üropod 3, peduncle short, 

 apicalh dentate, outer ramus much shorter and naiTOwer than inner. 

 Telson scarcely as long as peduncle of uropod 3, as broad as long, margins 

 Htrongly convex, ratber abruptly converging to the obtuse apex. L. (without 

 flexed part of pleon) about 3 mm. 



Port Jacksftn [East-Australia]. 



4. Gen. Amphithopsis Boeck 



1861 Amphithopsis (pari), A. Boeck in: Eorh. Skand. Naturf., Mede 8 p. 661 | 

 1876 .4., A. Boeck, Skand. Arkt. Amphip., v. 2 p. 349 \ 1893 Ä., G. O. Sars, Crust. 

 Norway, v.l p.455 | 1894 A., T. Stebbing in: Bijdr. Dierk., v. 17 p. 36. 



Back of peraeon broadly vaulted, with side-plates laterally outspread, 

 pleon Segments 5 and 6 dorsally not very short. Head, rostrum small, 

 post-antennal corners not produced. Antennae 1 and 2 long, slender, 

 subequal, accessory flagellum very small. Upper lip distally narrowed, 

 rounded. Lower lip without inner lobes. Mandible normal, 3^ joint ot 

 palp large. Maxilla 1, inner plate with several setae. Maxilla 2, inner 

 plate only partially fringed on inner margin. Maxillipeds normal, ratber 

 robust. Gnathopods 1 and 2 small, subequal, 5*^ Joint ratber elongate, 

 palm short, transverse. Peraeopods 3 — 5, 2* Joint oval, peraeopods 4 

 and 5 much longer than peraeopods 1 — 3. Uropods 1 — 3, outer ramus 

 rauch shorter than inner. Telson small, entire. 



1 species. 



1. A. longicaudata Boeck 1861 A. l, A. Boeck in: Forh. Skaud. Naturf., 

 Made 8 p. 663 ] 1876 A. l, A. Boeck, Skand. Arkt. Amphip., v.2 p. 351 t. 22 f . 3 | 1893 

 A.I., G. 0. Sars, Crust. Norway, v.l p.456 1. 161 | 1893 Acanthozone l. (part.), A. Della 

 Valle in: F. Fi. Neapel, u 20 p. 605 t. 59 f. 17. 



Peraeon segment 7 longest. Head, rostrum ratber prominent, lateral 

 corners narrowly rounded. Side-plates close set, 1*** distally expanded. Pleon 

 Segment 3, postero-lateral angles quadrate, produced point scarcely percep- 

 tible. Eyes irregularly round, ligbt red. Antenna 1 ratber longer than the 

 body, 1^* Joint a little longer than 2*^, 2^ about twice as long as 3*^, flagellum 5 

 times as long as peduncle, brittle, many-jointed, setulose, accessory flagellum 

 linear, l-joiuted, about as long as 1'** Joint of primary. Antenna 2 subequal to 

 antenna 1, less slender, ultimate Joint of peduncle longer than penultimate, both 

 of these togetber with proximal part of flagellum densely setose, flagellum more 

 than twice as long as peduncle. Gnathopod 1, 5*^ Joint somewhat expanded in 

 the middle, 6*^ subequal in length, widening distally to transverse palm, which is 

 about half as long as bind margin. Gnathopod 2 scarcely longer, more slender, 



Das Tierreich, 21. Lief.: T. R. R. Stebbing, Amphipoda I. 1» 



