282 Syrrhoe 



expanded, 4*'' very small. Eyes, wben present, dorsal, coalesced. Antennae 1 

 and 2 slender, anteiiua 2 tlie loiiger, in ö mucli the longer. Upper lip distally 

 narrowed, rounded. Lower lip, inner lobes well developed, mandibular 

 processes widely spread. Mandible, cutting- edge and accessory plate deutate, 

 spine-fow and molar normal, palp slender, 3^ jointminute, tipped with long setae. 

 Maxiila 1, inner plate with many setae, outer witb 11 spines, palp rather 

 long. Maxiila 2. plates subequal, inner fringed on inner margin. Maxillipeds, 

 inner plates rather broad, outer not very, fringed with spines, palp normal. 

 Guathopods 1 and 2 feeble, slender, subchelate, palm transverse, armed with 

 thnmb-like dentieulate spine. Peraeopods 1—5 slender; peraeopods 3 — 5 

 successively longer, with 2'^ Joint expanded, serrate on bind margin. ['ro- 

 pods 1 and 2, outer ramus much the shorter; uropod 3, outer ramus a 

 little the sliorter, 2-jointed. Telson long, deeply oleft. 



3 species. , 



1 



Synopsis of speeies: 



/ Pleon Segment 3, postero- lateral niargin not serrate 3. S. papyraeea . . p. 283 

 \ Pleon Segment 3, postero-lateral margin serrate — 2. 



Pleon segmenl 3, postero-lateral margin wholly 



serrate 1. S. crenulata . . p. 282 



Pleon Segments, ijostero-lateral margin partly serrate 2. S. semiserrata . p. 283 



1. S. crenulata Goes 1866 S.o., Gocs in: Öfv. Ak. Förh., «.22 p. 527 t. 40 

 f. 25 i 1876 S. c, A. Boeck, Skand. Arkt. Amphip., v. 2 p. 471 t. 9 f. 5; t. 12 f. 4 | 1893 

 S. c, G. O. Sars, Crust. Norway, vA p.390 1. 136 i 1893 S. c. (part.), A. DellaValle in: 

 F. Fl. Neapel, v. 20 p. 663 t. 59 f. 74. 



Body nearly cylindrical, peraeon segment 7 and pleon segments 1 — 3 

 dorsally serrate. Head strongly vaulted in front, rostrum reaching beyond 

 middle of 1*^* Joint of antenna 1. Side-plates 1 and 2 naiTOw, directed. for- 

 ward, 3*^ nearly securiform. front margin sloping forward, liind lobe narrowly 

 ti'uneate beueath deep emargination which receives side-plate 4. Pleon 

 Segments, postero-lateral angies in 2*^ a little produced, acute, in 3*^ nearly 

 quadrate, bind margin above sinuous, seiTate with upturned teeth, nearly 

 meeting the dorsal serration. Eyes forming a large dark red dorsal mass. 

 Antenna 1 in 9 , 1^* Joint with apical tooth, 2^ a little shorter than P*, 

 3*^ than 2*^, flagellum slender, rather longer than peduncle, 18-joiuted, 

 accessory flagellum with 3 joints, 3*^ minute. Antenna 2 in Q a little longer, 

 ultimate Joint of peduncle rather longer than long penultimate, both setulose, 

 flagellum half as long as peduncle. Antenna 1 in c5, 1^* Joint fully as long as 2'^ 

 and 3'^ combined, flagellum very long, 1^* Joint very large, densely fringed, 

 others rather long, accessory flagellum with laminar P* Joint. Antenna 2 ine?, 

 flagellum very long, filiform, joints short, uumerous. Upper lip, partly 

 carinate. Gnathopod 1, 5**^ Joint about twice as long as 6^^\ which is oblong 

 ti'iangular, widening distally and dense with delicate setae, tip 'of flnger 

 Crossing the palmar spine. Gnathopod 2 sirailar, but longer and more slender, 

 h^^ Joint about once and a half as long as the narrow 6^^ Peraeopods 3 — 5, 

 2*^ Joint coarsely serrate on bind margin, largest and produced downward 

 in peraeopod 5, which has b^^ and 6**^ joints elongate. Uropod 3, the 

 lanceolate rami setose on inner margiu. Telson long, lanceolate, nearly 

 thrice as long as broad, cleft -^ — ''l^ of length, apices acute (bidentate Goes), 

 contiguous. Colour variable, variegated with yellow, white and pink, side- 



