EXPIvANATlON OF PLATE XX. 



The dadyli are enlarged 50 times, the eggs 33 times. 



Fig. I. — Caridina nilotica (Ronx), typical form from Cairo, dactylus 

 of third pair of the egg-bearing female (No. i of Table 

 A) ; ja dactylus of fifth pair of the specimen No, 7 ; 16 

 egg, 0*86 mm. long, of the female No. 5. 



,, 2. — Car. nilotica (Roux), variety from Lake Victoria Nyanza, 

 dactylus of third pair of the female 27 mm. long, 2a 

 dactylus of fifth pair and 2& egg, 0*67 mm. long, of the 

 same female. 



,, 3. — Car. nilotica (Roux)^ var. natalensis nov., dact34us of third 

 pair of the female No. i of Table C ; ^a dactylus of fifth 

 pair of the same female ; 3^ egg, 0*42 mm. long, of 

 the female No. 2. 



,, 4.— Car. nilotica (Roux), var. paucipara, M. Weber, dactylus 

 of third pair ; 4« dactylus of fifth pair and 4& egg, i"04 

 mm. long, of the female No. 3 of Table D. 



,, 5. — Car. nilotica (Roux), var. longirostris , H. M. Edw., dac- 

 tylus of third pair and 5« of fifth pair of the female 

 No. 7 of Table E ; 5& egg, 0*39 mm. long, of the female 

 No. 2. 



,, 6. — Car. nilotica (Roux), var. hengalensis nov., dactylus of 

 third pair of the female No. 6 of Table F ; 6a dactylus 

 of fifth pair and bh egg, 0*47 mm. long, of the female 

 No. I. 



,, 7. — Car. nilotica (Roux), var. gracilipes, de Man, dactylus of 

 third pair, ya of fifth pair and yb egg, 0*38 mm. long, 

 of the female No. 2 of Table H. 



,, 8. — Car. nilotica (Roux), var. brachydactyla, nov., dactylus of 

 third pair, 8b of fifth pair and 8c egg, 0*44 mm. long, 

 of the female No. i of Table G ; 8a dactylus of third 

 pair of the female No. 4. 



,, 9. — Car. nilotica (Roux), var. minahassa, de Man, dactylus 

 of third pair and ga of fifth pair of a specimen, 16 mm. 

 long, co-type from Kiikenthal's Collection; gb egg, 



• 0*55 mm. long. 



