Synopia, Tironidae 273 



S. caraibica Bovall. 1886 S. c, ßovallius in: J<. Acta Soc. üpsal., ser. 3 ».13 

 nr. 9 p. 14 t. 2 f. 30 } 1893 S. ultramarina (part.), A. DellaValle in: F. Fl. Neapel, 

 i'. 20 p.851. 



L. 5 mm. 



Caribbean Sea. 



S. Orientalis Kossm. 1880 S. o., Kossmann in: Reise Koth. Meer, v.2i Malacost. 

 p. 137 t. 15 f. 11-13 j 1886 S.o., Bovallius in: X. Acta Soc. Upsal., ser. 3 ».13 nr. 9 

 p. 21 i 1893 S. Ultramarina (part.), A. DellaValle in: F. Fl. Neapel, u 20 p. 851. 



L. 3 mm. 



Red Sea. 



21. Farn. Tironidae 



1871 Subfam. Syrrhohiae, A.Boeckin: Forh. Selsk. Christian., 1870 p.l46 | 1888 

 Syrrhoidae, T. Stebbiiig in: Rep. V^oy. Ghallenger, ».29 p. 787 | 1893 S., G. 0. Sars, 

 Crust. Norway, v. 1 p. 388. 



Pleou well developed. Head usually produced iuto a deflexed rostrum. 

 Side-plate 4 (except in Argissa, Fig. 70 p. 276) not couspicuously large, often 

 smaller than 3*^. Eyes of various cbaracters. Antenna 1 with accessoiy 

 flagellum, peduncle longer, flagellum shorter in Q than in ö; antenna 2 

 little or not longer than antenna 1 in o , considerably longer in ö . Lower 

 lip (Fig. 71 p. 278), with inner lobes. Maudible robust, bat palp slight, usually 

 with very short 3*^ Joint. Maxilla 1, inner plate with several setae, outer 

 with (so fär as kuown) 11 spiues, 2*^ Joint of palp long. Maxilla 2, inner 

 plate rather the broader, fringed on inner margin. Maxillipeds normal. 

 Gnathopods 1 and 2 feeble, slender, not very unequal, ö^^ Joint long, 6*^ 

 shorter, subchelate or simple. Peraeopods 1 and 2 slight. Peraeopod 5 

 usually the longest. Uropods 1 and 2, outer ramus the shorter; uropod 3, 

 rami subequal. Telson long, cleft (except in Bruzelia, p. 274). 



31arine. 



7 genera, 13 accepted species. 1 doubtfiil. 



Synopsis of genei-a: 



I Telson undivided 1. Gen. Bruzelia . . . p. 274 



I Telson deeply cleft — 2. 



, ( Four eyes 2. Gen. Tiron . . . . p. 275 



I Eyes tw9, coalesced or separate, or uone — 3. 



I Side-plate 4 larger than 3d (Fig. 70) — 4. 

 \ Side-plate 4 not larger than 3<i — 5. 



/ Mandiblc, molar large; maxillipeds, outer plates 



I of moderate size 3. Gen. Argissa . . . p. 276 



j Mandible, molar very small; maxillipeds, outer 



' plates very large 4. Gen. Astyra . . . . p. 278 



. I Side-plate 3 not greatly expanded distally . . 5. Gen. Syrrhoites . . p. 279 

 ) Side-plate 3 greatly expanded distally — 6. 



f Gnathopods 1 and 2 subchelate 6. Gen. Syrrhoe . . . p. 281 



I Gnathopods 1 'and 2 simple 7. Gen. Pseudotiron . p. 284 



Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 18 



