Ampelisca 



99 



inner broader than outer. Telson (Fig. 24) oblong, cleft nearly to the base. 

 Two pairs of hepato-pancreatic caeca. 



25 species accepted, 7 insufficieiitly described. 



'I 



10 - 



11 



( 



Synopsis of the accepted species: 



Peraeopod 5, 3d Joint shorter than 4tli — 2. 



Peraeopod 5, 3d Joint longer than 4tli — 10. 



Eyes preseut — ■ 3. 



Eyes wanting — 8. 



Pleon Segment 3, postero-lateral margin bisi- 



nuate — 4. v 



Pleon Segment 3, postero-lateral margin not 



bisinuate — 7. 



Telson without dorsal setules 



Telson with dorsal setules — 5. 



Peraeopod 1, 4th Joint with produced distal lobe 

 Peraeopod 1, 4th Joint without produced distal 



lobe — e. 

 Pleon Segment 4, dorsal carina little elevated 

 Pleon Segment 4, dorsal carina much elevated 



Pleon segment 3, postero-lateral angles qua- 



drate, antenna 1 much shorter than antenna 2 

 Pleon segment 3, postero-lateral angles rounded, 



antenna 1 not shorter than antenna 2 . . 



Antenna 1, flagellum many-jointed 



Antenna 1. flagellum few-jointed — 9. 

 Peraeopod 5. 6th joint longer than ö^h . . . 

 Peraeopod 5, 6tli joint shorter than Stt . . . 

 Gnathopod 2 shorter and stouter than gnatho- 



pod 1 



Gnathopod 2 not shorter or stouter than 



gnathopod 1 — 11. 

 Antenna 2 not very much longer than antenna 1 — 

 Antenna 2 very much longer than antenna 1 — 18. 

 Cornea not thickened to a lens — 13. 

 Cornea thickened to a lens — 15. 

 Antenna 2, ultimate Joint of peduncle not longer 



than penultimate 



Antenna 2, ultimate Joint of peduncle longer 



than penultimate — 14. 

 Pleon segment 3, angles slightly produced . . 

 Pleon segment 3, angles not produced . . . 



Corneal lenses large 



Corneal lenses small — 16. 

 Pleon segment 4 with elevated cariaa .... 

 Pleon segment 4, carina not elevated — ■ 17. 

 Peraeopods 1 and 2, 7tli joint not longer than 



5th and 6th 



Peraeopods 1 and 2, 7tii joint longer than 5tli 



and 6th 



Peraeopods l and 2, 7tli joint much longer than 



5th and ßth — 19. 

 Peraeopods 1 and 2, 7th joint not much longer 



than 5th and 6th — 20. 



1. Ä. 



2. A. 



3. A. 



4. A. 



eschrichtii . 

 bi'evicornis . 



maeroeephala 

 gibba . . 



5. A. chiltoni 



6. A. 



7. A. 



8. A. 



9. A. 



fasca . . . 

 odontoplax 



uncinata . 

 abyssicola 



10. A. australis 



12. 



.ß*r^ 



p. 100 



p. 100 



p. 101 

 p.lOl 



p. 102 



p.l02 

 p. 103 



p. 103 

 p. 104 



p. 104 



11. A. rubella ....*. p. 104 



12. A. 



13. A. 



14. A. 



amblyops 

 pusilla . 

 anomala 



15. A. spinipes 



16. A. 



17. A. 



aequicornis . . 

 serraticaudata 



7* 



p.l05 

 p. 105 

 p. 106 



p. 106 / 



p. 106 

 p. 107 



