1906.] Life-history of Adelea ovata, Aime Schneider. 163 



DESCRIPTION OF PLATES. 



[All figures are drawn from permanent preparations stained with hematoxylin. Drawings 

 made under a 3-mm. apochromatic objective (Zeiss) with compensating-ocular 12.] 



Plate 2. 



Fig. 1. — Microgametocyte associating with macrogametocyte (lying free in gut). Karyo- 



some of microgametocyte has partially broken up to form a chromidial net. 

 Fig. 2. — In this figure the chromidial net is seen distributed throughout the whole of the 



microgam etocy te. 

 Fig. 3. — The chromidial net of the microgametocyte has become gathered together into a 



dumbbell-shaped network. 

 Fig. 4. — Stage in formation of four nuclei. The developing nuclei are still connected 



with the chromidial net. 

 Fig. 5. — The four nuclei are showing signs of becoming separated as star-shaped masses 



of chromatin. Part of the network is still visible. 



Plate 3. 



Fig. 1. — Association of two microgametocytes with a single macrogametocyte. A 

 chromidial net is seen in both the former. 



Fig. 2. — Association of two microgametocytes (each containing four characteristic star- 

 shaped nuclei) with one macrogametocyte. 



Fig. 3. — Two microgametocytes associating with one macrogametocyte. In one, four 

 nearly ripe microgametes are seen ; in the other, a dumbbell-shaped network is 

 present. 



Fig. 4. — Four mature male gametes formed. A chromatic spindle is seen in the 

 macrogamete. 



Fig. 5. — Macroschizont, the nuclei in the form of networks. Numerous chromatin 

 particles are scattered through the cytoplasm. 



Fig. 6. — Group of macromerozoites with nuclei in a chromidial condition. 



