G2 11 J. HANSEN. 



Gen. 2. Scolopenclrclh); Gervais. 



The cliaracterisation of this genus lias been given above on 

 p. 24, and some supplementary notes have been added imme- 

 diately after the diagnosis. 



Conspectus of the Species. 



It may be practical to divide the genus into three groups, 

 and then to produce a key of the species of each group. 



A. The first pair of legs contain three free and very distinct 

 joints (the trochanter not included) ; the tarsus terminates in 

 two conspicuous claws. 



a. The scuta have the hind margin between their processes 

 provided with a transverse belt adoi-ned with numerous longi- 

 tudiual stripes. The cerci without transverse stripes on the 

 most distal part opposite to the terminal area. The head 

 with the ceuti'al rod interrupted in front of the middk', 

 where there is a pair of very short lateral branches (while the 

 anterior branches are scarcely perceptible). The first pair 

 of legs more than two thirds as long as the second pair, and 

 of normal shape ..... Group I. 



h. The scuta have the hind margins simple, without any 

 striped belt. The cerci with several transverse elevated 

 lines across the distal part opposite to the terminal area. 

 The head has the central rod without lateral branches in 

 front of the middle. The first pair of legs at most about 

 half as long as the second pair, considerably reduced and 

 deviating from normal legs as to the length and sha})e of the 

 joints ...... Group II. 



B. The legs of the first pair rudimentary, each leg being a 

 wart-like protuberance without claws . . Group III. 



Species of Group I. 



Three of the characters pointed out in tlie key, viz. the 

 development of the first pair of legs, the absence of trans- 



