159 



8. Pereopods III and IV thin and long. Distal denticles of 6th segment 

 of pereopods I and II large 12. 5. marginata (Bov.) 



— Pereopods III and IV well proportioned with broad 4th, 5th, and 

 6th segments. Distal denticle of 6th segment of pereopods I small 



(especially in females), and totally absent in pereopods II 



13. S. submarginata Tat. 



9. Pereopods VII with broad segments; length of 6th segment 2 times 

 or less exceeds its width; claw small and uncinate 10. 



— Pereopods VII: length of 6th segment more than twice width; claw 

 of normal structure, not uncinate 13. 



10. Pereopods V-VII with numerous long setae on distal surface of their 

 segments 10. S. pubera Wagl. 



— Pereopods V-VII without numerous setae on distal surface of their 

 segments 11. 



1 1 . Antennae I equal in length to pereon and pleon together. Pereon and 

 pleon with dorsal keel; denticle on last somite of pleon. Pereopods V: 

 anterior margin of 2nd segment smooth, except for three denticles on 

 distal process 32. 5. alberti Chevr. 



136 — Antennae I equal to or shorter than pereon in length. Body without 

 dorsal keel or denticles. Pereopods V: anterior margin of 2nd segment 

 highly denticulate 12. 



12. Pereopods III and IV; posterior margin of 6th segment in its distal 

 part with more or less distinct notch. Pereopods V: 2nd segment 

 shorter than rest together; 4th segment somewhat larger than 5th . . 

 8.5. spinosa Vos. 



— Pereopods III and IV: posterior margin of 6th segment without notch 

 in distal part. Pereopods V: 2nd segment at least in sexually mature 



females longer than rest together; 4th segment equal to 5th 



9.5. indica Vinogr. 



13. Pereopods VII longer than 2nd segment of pereopods VI. 

 Pereopods V: claw not highly elongated 14. 



— Pereopods VII shorter than 2nd segment of pereopods VI. Claw of 

 pereopods V long and thin .20. 



14. Uropods I armed with large spines on innt margin — 15. 



— Uropods I with smooth inner margin 17. 



15. Maxillipeds with long, distally highly tapering outer lobes. Length of 

 lobes, more than thrice their width. Claw on pereopods V smooth . . 

 ..16. 



— Maxillipeds with short oval outer lobes. Length of lobes less than 

 twice their width. Claw on pereopods V with row of setae on poste- 

 rior margin 6. 5. vosseleri Tat. 



16. Uropods long and narrow. Width of urosomite III less than its length. 

 Exopodites of uropods I and II long. . ......... 18. 5. wagleri Behn. 



