26 H. J. HANSEN. 



very elongate, the longest of tliem at least two and a half 

 times longer than the seta3 on the outer side. The exopods 

 of the posterior legs short or very short, considerably or 

 nrnch shorter than the depth of the tarsi. The last scutum 

 deeply depressed posteriorly along the middle . Group III. 



Species of Group I. 



a. The femur of the first pair of legs without any process. 



1. S. immaculata (Newp.). 



b. The femur of the first pair of legs with a conspicuous, 

 oblong, and distally rounded process on the lower side. 



2. S. armata, n. sp. 



Species of Group II. 



a. The second scutum with the antero-lateral seta3 much 

 (generally twice) longer than any of the lateral sette, and 

 these are all directed essentially backwards. 



a. The sette on the cerci very numerous, all rather short, 

 and the distal ones not half as long as the depth of the 

 cerci. 



§. The posterior pairs of legs with the anterior claw, 

 especially its distal slender part, very elongate, while the 

 other claw is of normal length and very slender. 



3. S. unguiculata, n. sp. 



§§. The posterior pairs of legs with the anterior claw at 

 most of moderate length, while the other is of normal depth. 



X. The central whorl on the antennal joints with the seta3 

 rather short and those on the lower side considerably shorter 

 than on the upper. The first pair of legs with the posterior 

 claw a little more than half as long as the other. 



4. S. caldaria, n. sp. 



XX. The central whorl on the antennal joints with the setae 

 rather long and those on the lower side only a little shorter 

 than on the upper. The first pair of legs with the posterior 

 claw not half as long as the other . 5. S. orientalis, n. sp. 



