Fresh-water Fntomostraca of South America. 99 



PI. X. 



Alonella lineolata, G. 0. Sars. 



Fig. 1. Adult ovigerous female, viewed from left side; magnified 

 200 diameters. 

 » la. Caudal part, magnified 300 diameters. 



Alonella Kama (King). 



Fig. 2. Adult ovigerous female, viewed from left side; magnified 



240 diameters. 

 » 2a. Caudal part, magnified 340 diameters. 

 » 2h. Posterior part of left valve, exhibiting the denticles at the 



infero-posteal corner. 

 » 2c. Adult male, viewed from left side; magnified 240 diameters. 

 » 2d. Same, caudal part; magnified 340 diameters. 



Alonella diaphana (King). 



Fig. 3. Adult ovigerous female, viewed from left side; magnified 

 155 diameters. 

 » 3a. Caudal part, magnified 245 diameters. 

 » 3b. Adult male, viewed from left side; magnified 155 diameters. 



Alonella dentifera, G. O. Sars. 



Fig. 4. Adult ovigerous female, viewed from left side; magnified 

 155 diameters. 

 » 4a. Caudal part, magnified 245 diameters. 



Alonella clathratiila, G. O. Sars. 



Fig. 5. Adult ovigerous female, viewed from left side; magnified 165 

 diameters. 

 » 5a. Posterior part of carapace, together with the caudal part, 

 viewed from left side; magnified 255 diameters. 



Alonella sculpta, G. O. Sars. 



Fig. 6. Adult ovigerous female, viewed from left side; magnified 

 155 diameters. 

 » 6a. Caudal part, magnified 245 diameters. 



Alonella nitidula, G. O. Sars. 



Fig. 7. Adult ovigerous female, viewed from left side; magnified 

 200 diameters. 

 7a. Caudal part, magnified 300 diameters. 



