Additional Notes on South African Phyllopoda. 9 



ventral limbs, as is easily ascertained, M^ien the body is 

 viewed from below (see fig. 2); and these segments accordingly 

 constitute the caudal part of the body. In A. numidieus 

 this number of caudal segments is only found in the male, 

 while the female does not exhibit more than 11 such seg- 

 ments. This is indeed a very essential difference, which 

 alone suffices to distinguish the present form specifically 

 from A. numidieus. The last caudal segment, as in other 

 species, is considerably larger than the others, about equalling 

 in size the 3 preceding ones combined, and is somewhat 

 flattened, slightly widening distally. It is armed dorsally 

 with several blunt spines, and exhibits at the end below 

 (see fig. 2), a depression containing the anal opening, and 

 covered above by a short lamella slightly emarginated in 

 the middle. This lamella, which scarcely projects at all, 

 answers to the greatly produced caudal plate in the genus 

 Lepidurus. As in other species, all the exposed segments 

 preceding the last one exhibit dorsally a transverse row of 

 dark-coloured denticles, which in the non-pedigerous segments 

 is also continued round the ventral face. These denticles 

 are shorter and blunter in the present form than in most 

 other species, but are present in about the same number. 



The caudal filaments are not much elongated, scarcely 

 attaining half the length of the body; otherwise they are 

 of the usual structure. 



The 11th pair of legs (fig. 3) exhibit the structure 

 characteristic of the female Apodidœ, the exopodite and 

 epipodite being peculiarly modified to form together a box- 

 like capsule, in which the ova are received before being 

 deposited, and in which they apparently become surrounded 

 by their firm envelope. No less than 14 such ova were 

 found within the capsule in the specimen examined. 



