254 ILLINOIS BIOLOGICAL MONOGRAPHS [492 



EXPLANATION OF PLATE 



Figs. 550 to 557. Henneguya mictospora. Original. 



Fig. 550. A stained trophozoite. X1700. 



Figs. 551 to 553. Three different stages of development of disporous trophozoites. Giemsa. 



X1700. 

 Figs. 554 and 555. Two stages of monosporous trophozoites. Giemsa. X1700. 

 Figs. 556 and 557. Different views of mature spores in vivo. X2000. 

 Figs. 558 and 559. Henneguya wisconsinensis. After Mavor and Strasser (1916). 

 Fig, 558. A trophozoite in vivo (1916, Fig. la). X570. 

 Fig. 559. A fresh spore (1916, Fig. 3d). X4000. 



Figs 560 and 561. Trophozoites oi Chloromyieum catostomi. Original. X1500. 

 Figs. 562 to 565. Chlorotnyxum clupeidae. Original drawn from Dr. Tyzzer's smears which 



were restained. X2360. 

 Fig. 562. Anterior end view of two spores in preserved and decolorized smears. 

 Fig. 563. The same views of three spores restained with Giemsa mixture. 

 Fig. 564. Front view of a preserved and decolorized spore. 

 Fig. 565. The same views of two spores restained with Giemsa's mixture. 

 Figs. 566 to 572. Spores of Myxobolus orbiculatus. Original. 



Figs. 566, 569 and 570. Different views of normal spores in preserved specimen. X 1500. 

 Figs. 567 and 568. Abnormal spores. X1500. 

 Fig. 571. A spore stained with Lugol's solution. X1500. 

 Kg. 572. A spore stained with Giemsa's mixture. X2360. 



