﻿30 Annals of the South African Museum. 



The mouth organs agree fairly well with those figured by Sars for 

 the typical species, but the mandible has the cleavage of its bifid 

 apex more distinct or less overlapping than as shown for that species, 

 and the vibratory fan of the second maxilla has its lower portion 

 much broader. The middle plate of the first maxilla has six spines 

 instead of four, and the outer border of the palp has only two setae 

 instead of a fringe. The endopod of the first maxilliped is shorter in 

 relation to its exopod than that figured by Sars. 



The large subchelate first peraeopods, the slender second with 

 their small chela, the slender third pair with needle-like sixth 

 and seventh joints, and the stouter fourth and fifth pairs, do not 

 offer any striking differences from those of the allied species. 

 Differences in the relative lengths of joints are only such as may 

 be referred to individual valuation. 



The first pleopods have the small inner branch distally narrowed 

 as if to serve the purpose of a coupling apparatus, but no hooked 

 spine could be perceived, nor is such apparatus present on any of 

 the following pairs. Faxon says of S. j^^'ocax that " the terminal 

 segment of the inner branch of the second abdominal appendage in 

 the male bears on its inner margin a short blunt stylamblys, which 

 is absent in S. agassizii." I cannot see any indication of this in his 

 figure of the second pleopod in question. In our species the inner 

 branch is distally bilobed, the inner lobe the longer, both distally 

 setose. The following pleopods have each a small simple inner 

 branch, these branches in each pair set so far apart that they could 

 not easily be coupled together. The medio-ventral spines between 

 them appear to be characteristic of the male sex. 



The female specimen is 40 mm. long, and much more bulky than 

 the male, which measured only 22 mm. in length. 



Locality. Cape Natal N. by E. 24 miles (Natal) ; depth 440 

 fathoms. A 1564. 



The specific name is given out of respect to Mr. W. H. Bell-Marley, 

 of Durban, to whose kindness I am indebted for various interesting 

 specimens. The present species must, I think, be regarded as a 

 connecting link between <S'. jacqueti and S. procax. 



Family PALAEMONIDAE. 



1910. Palaemonidae, Stebbing, Ann. S. African Mus., vol. G, p. 383 

 (with synonymy). 



