160 



— Uropods broad. Width of urosomite III greater than its length. 



Exopodites od uropods I and II reduced to small spines 



7. 5. borealis (G. Sars) 



17. Inner margin of uropods II facing point of attachment of exopodite 

 does not bend sharply 18. 



— Inner margin of uropods II facing point of attachment of exopodite 

 bends sharply 24. S. excisa Wagl. 



18. Length of urosomite HI more than its width. Pereopods V: distal 

 process of 2nd segment short, not reaching or only slightly exceeding 

 distal margin of 3rd segment 19. 



— Length of urosomite III less than its width. Pereopods V: distal pro- 

 cess of 2nd segment very long, reaching almost half length of 4th 

 segment 25. 5. damasi Pirl. 



19. Pereopods V: broad 2nd segment has large denticles on anterior and 

 posterior margins; 6th segment longer than 5th. Rami of uropods I 



and II small; exopodite 1/7-1/6 of basipodite in length 



27. 5. pusilla Chevr. 



— Pereopods V: narrow 2nd segment weakly armed on anterior and 

 posterior margins; 6th segment 1/2 length of 5th. Rami of uropods I 

 and II very long; exopodite of uropods I equal to half length of 

 basipodite but in uropod II equal to it 26. S. typhlops Wagl. 



20. Pereopods V: 4th segment roughly equal to 5th; 6th segment half 

 length of 4th. Pereopods VI considerably longer than pereopods V; 

 claw absent 31. S. inermis Chevr. 



— Pereopods V: 4th segment almost half length of 5th, which is equal 

 to 6th. Pereopods VI roughly equal in length to pereopods V; claw 

 present 30. S. lepisma (Chun.) 



21. Pereopods V: 5th and 6th segments very short, forming a subchela. 



Pereopods VII: 2nd segment broadened and oval 



29. 5. chelata Vinogr. 



137 — Pereopods V: 5th and 6th segments not very short and do not form 

 a subchela. Pereopods VII: 2nd segment linear 22. 



22. Uropods I on inner margin facing point of attachment of exopodite 

 with a separate large spine and slightly smaller spines on 

 basipodite 23. 



— Uropods I on inner margin facing point of attachment of exopodite 

 without large solitary spine 24. 



23. Maxillipeds with narrow and highly elongated outer lobes: length 

 of lobes roughly eight times their maximum width. Pereopods VI 

 roughly same length as pereopods V 17. S. wolterecki wagl. 



— Length of outer lobes of maxillipeds thrice their maximum width. 



Pereopods VI markedly shorter and stronger than pereopods V 



16. S. oedicarpus Stebb. 



