On some South- African Phyllopoda. 29 



The compound eyes (see fig. 4) are rather strongly 

 dilated distally, and distinctly claviform in shape. The 

 ocellus occupies its normal place. 



The antennulæ are very slender and elongated, especi- 

 ally in the male, considerably exceeding the length of the 

 head including the cervical segment. 



The antennæ in the female (fig. 1) exhibit an appear- 

 ance rather similar to that in Streptocephalus gracilis. In 

 the male (figs. 2, 3, 4), however, they are very different, 

 more resembling those in the male of Branchipus or 

 Chirocephalus. They are comparatively short and robust, 

 consisting each of s very thick and muscular basal part, and 

 a strongly chitinized, claw-shaped terminal part, both very 

 movably articulated together. The basal part is very mas- 

 sive, and exhibits a somewhat irregular form, both the outer 

 and inner faces being angular in the middle. From the 

 inner side, moreover, issue 2 differently formed projections, 

 the anterior being rather large and bi dentate at the tip, the 

 posterior having the form of a small linguiform lobe. In 

 Brauer's species a similar lobe occurs, but of the bidentate 

 projection no trace is seen, and the antennæ on the whole 

 are far less robust than in the present species. The terminal 

 part has its articulation within a hollow of the basal part, 

 and exhibits the form of a slender, strongly curved claw, 

 without any crests and denticles. It terminates in an obtuse 

 point, which meets the corresponding point of the other 

 side, when the antennæ are bent in against each other. The 

 prehensile character of these antennæ is very obvious. 



The oral parts do not seem to exhibit any peculiarity 

 in their structure, except that in the male, just in front of 

 the labrum, and behind the insertion of the antennæ, there is 

 a small spinulose papilla, of which no trace is found in the 



