348 Annals of the South African Museum. 



Leydigia macrodonta, n. sp. 

 2. Adult female, lateral view. 

 2a. Inferior part of head. 

 2b. Tail-piece. 



PLATE XXXVIII. 

 Leydigia propinqua, G. O. Sars. 



1. Adult female, lateral view. 

 la. Inferior part of head. 



16. Tail-piece. 



Leydigia microps, n. sp. 



2. Adult female, lateral view. 

 2u. Inferior part of head. 



26. Tail-piece. 



2c. Adult male, lateral view. 



2d. Tail-piece of same. 



PLATE XXXIX. 

 Alona affinis (Leydig). 



1. Adult female, lateral view. 

 In. Tail-piece. 



Alona harpularia, n. sp. 



2. Adult female, lateral view. 

 2a. Tail-piece. 



Alona arcuata, n. sp. 



3. Adult female, lateral view. 

 3a. Tail-piece. 



Alona striolata, n. sp. 



4. Adult female, lateral view. 

 4a. Tail-piece. 



Alona intermedia, G. O. Sars. 



5. Adult female, lateral view. 

 5a. Tail-piece. 



PLATE XL. 

 Alona crassicauda, n. sp. 



1. Adult female, lateral view. 



la. Tail-piece. 



Alona pulchella, King. 



2. Adult female, lateral view. 

 2a. Tail-piece. 



Alona bukobensis, Welthner. 



3. Adult female, lateral view. 

 3. Tail-piece. 



Alona karua, King. 



4. Adult female, lateral view. 

 4. Tail-piece. 



