146 CARL BOVALLIUS, AMPHIPODA HYPKRIIDEA. I. 2. 



aaaaaaaa 2. The serration on the hind margin 

 of the raetacarpus of the first pair 

 of pera3opoda consists of three- 



pointed teeth 5. 



aaaaaaa 3. The front side of the carpal process of 

 the first pair of perajopoda is half as 

 long as the hind margin of the meta- 



carpus - -- fi. 



aaaaaa 2. The hind margin of the metacarpus of the 

 first two pairs of perajopoda is notched and 



fringed with long spines.. 7. 



aaaa 2. Tlie uropoda are narrow and slender. 



aaaaa 3. The last five pairs of perasopoda are sparingly pro- 



vided with short hairs 8. 



aaaaa 4. The last five pairs of perasopoda are naked 9. 



aaa 2. The front side of the carpal process of the first pair of 

 pera3opoda is more than half as long as the hind margin of 



the metacarpus 10. 



aa 4. The first personal segments is mueh longer than the second one 11. 



B. The first perasonal segment is free, the second, third, fourth and fifth coalesced, 

 the last two free 13. 



C. The first and second peraeonal segments are coalesced, the following free. 

 C 1. The carpus of the first pair of periBopoda is only a little dilated and 



scarcely produced. 



CC 1. The telson is not more than half as long as the peduncle of the 



last pair of uropoda ._ 13. 



CC 2. The telson is much more than half as long as the peduncle of the 



last pair of uropoda 14. 



C 2. The carpus of the first pair of perajopoda is very dilated and distinctly 



produced 15. 



D. The first three perteonal segments are coalesced, the last four free. 



(I 1. The telson is only a little broader than the peduncle of the last pair of 



uropoda, and not half as long as the same peduncle... lö. 



(1 2. The telson is twice as broad as the peduncle of the last pair of uropoda, 

 and more than half as long as the same peduncle. 

 dd 1. The front margin of the carpal process of the first pair of peraso- 



poda is not half as long as the hind margin of the metacarpus 17. 



dd 2. The front margin of the carpal process of the first pair of perajo- 



poda is more than half as long as the hind margin of the metacarpus 18. 



E. The first four penuonal segments are coalesced, the last three free 19. 



F. The first five perseonal segments are coalesced, the last two free. 



f 1. The cai-pal process of the first pair of perasopoda is very short, much 



shorter than half the hind margin of the metacarpus 20. 



f 2. The carpal process of the first pair of pera3opoda is long, the front side 



more than half as long as the hind margin of the metacarpus. 21. 



HYPERIIDJE. 



Hyperia. 



II. iralba. 



I. Normani. 



II. spiuigera. 



II. agilis. 

 II. fera. 



II. beiigalensis. 

 II. sibagiiiis. 



II. dysschistus. 



II. Fabrei. 



II. luzoiii. 



II. promontorii. 



II. Daiise. 



II. schizoKeiieios. 



II. cruiMpes. 

 II. lattssinia. 



II. thoracica. 

 II. (lilesi. 



