On some South- African Phylløpoda. 31 



the whole tail. In the living animal they are greatly curved, 

 and carried in such a manner, as to form a pair of much 

 bowed tongs, their very slender distal parts curving inwards 

 against each other, and the tips being curled up anteriorly. 

 Along- the whole outer edge and the proximal part of the 

 inner, they are fringed with comparatively short setæ, whereas 

 the distal part of the inner edge is divided into a number 

 of small tooth-like projections. In Brauers species the 

 caudal rami are stated to be of exactly the same appearance 

 in the two sexes. 



The body in both sexes is highly pellucid, with a slight 

 yellowish tinge, sometimes changing to light carneous. In 

 fully grown specimens each of the caudal segments generally 

 exhibits ventrally a transverse, orauge band, and in the 

 male, moreover, the frontal part of the head, as also the 

 caudal rami, are tinged with light orange or yellow. The 

 marsupium of the female is richly coloured, exhibiting several 

 beautiful tints passing into each other: yellow, orange, 

 crimson and blue. 



Development. — I have studied the whole larval 

 development of this form; but as it agrees exactly with 

 that in other Branchipodids, I do not think it necessary to 

 describe it in detail. I only give, on the accompanying 

 plate, figures of 2 different stages, the one, fig. 8, represent- 

 ing the Nauplius immediately after being hatched, and seen 

 from the ventral face; the other, fig. 9, representing a larva 

 in a somewhat later stage, viewed from above. The length 

 of the Nauplius is only 0.44 mm.; that of the larva repre- 

 sented in fig. 9 is 0.82 mm. The whole larval development 

 is gone through in the course of about 4 days, and the 

 animal becomes sexually mature after the lapse of about a 

 fortnight. 



