Additional Notes on South African Phyllopoda. 17 



the shell-glands are also easily observable, though they do 

 not cause any distinct convexity of the surface. The eyes 

 and post-ocular tubercle are nearly as in A. numidicus. On 

 the other hand, the surface of the carapace is peculiar by 

 its roughness, being everywhere covered with small brownish 

 prickles arranged in a somewhat irregular manner, and giving 

 it a dull scabrous appearance. 



The exposed part of the body appears rather short and 

 thick as compared with that in the other African species, 

 not even attaining the median length of the carapace. It 

 may be that in the specimen examined, this part is some- 

 "what contracted by the action of the spirit; but in any 

 case the relative proportion of this part to that of the 

 carapace seems to be essentially different from that found 

 in the other species. It comprises about 24 segments, all 

 of w^hich are very strongly spinous. Of the segments, only 

 the 10 posterior ones are without ventral appendages (see 

 fig. 2), and accordingly belong- to the tail, which thus has a 

 smaller number of segments than in any of the other African 

 species. In all female specimens of A. numidicus examined 

 by me, 11 such segments are present, and as the number of 

 caudal segments, also according to other authors, seems to 

 afford a pretty constant distinguishing character, the different 

 number in the present form would seem to corroborate the 

 assumption of its specific distinctness. 



The caudal filaments are very fully developed and in 

 fact considerably longer than represented in the figure here 

 given, almost equalling, as they do, the length of the 

 whole body. 



The structure of the other appendages I have not 

 examined more closely for want of sufficient material ; but 



2 — Archiv for Math, og Naturv. B. XXI. Nr. 4. 

 Trykt den 28de Juni 1899. 



