22 G. 0. Sårs. 



smooth, as in that species, but coarsely serrate at the edges 

 like that in S. PurcelU. 



The outer lobe of the endopodite is broadly truncated 

 at the tip, and, at least on the middle pairs, has the inner 

 corner divided into coarse teeth, which are also continued 

 along the inner edge of the lobe (see fig. 9). 



The external sexual appendages are much as in the male 

 of S. gracilis. 



The caudal rami (see fig. 10) likewise agree more nearly 

 in structure with those in 8. gracilis, than with those in 

 S. PurceUi. They are, however, comparatively longer than 

 in the first-named species, equalling in length the last 4 

 caudal segments combined. As in S. gracilis, the outer edge 

 is fringed throughout its whole length with a regular row 

 of finely plumous setæ, while the inner edge is armed Avith 

 numerous unequal spines of a somewhat flattened shape, 

 and pointing more upwards. Only in the most proximal 

 part of the rami do these spines assume a setiform character. 

 The rami more properly issue from the sides of the last 

 segment, which is produced between them to an obtuse 

 prominence carrying the anal orifice. 



Occurrence. — Of this form 2 male specimens, exactly 

 agreeing with each other, both as to size and structure, were 

 forwarded to me, having been taken by Mr. J. L. Drege 

 at Port Ehzabeth. 



