256 ILLINOIS BIOLOGICAL MONOGRAPHS [494 



EXPLANATION OF PLATE 



Figs. 573 to 576. Myxobolus orbiculatus. Original. 



Fig. 573. Young vegetative forms in the muscle fibres. From a section stained with Heid- 



enhain's iron hematoxylin. X900. 

 Figs. 574 and 575. Two vegetative forms under higher magnifications. X1500. 

 Fig. 576. A cross section thru the infected muscle fibres, stained with Heidenhain's iron 



hematoxylin. X900. 

 Figs. 577 to 581. Hoferellus cyprini. After Doflein (1898). 

 Figs. 577 and 578. Two vegetative forms (1898, Figs. 106 and 105). 

 Figs. 579 to 581. Spores (1898, Figs. 108 and 107). 

 Figs. 582 and 583. Genus incert. merlucii. After Perugia from Gurley (1894, PI. 29, 



Figs. 2 and 7). 

 Figs. 584 and 585. Genus incert. congri. After Perugia from Gurley (1894, PI. 6, Figs. 7 



and 3). 

 Figs. 586 and 587. Genus et species incertae. After Mavor (1915). 

 Fig. 586. A trophozoite with attached Ceratomyxa acadknsis (1915, Fig. 8). X830. 

 Fig. 587. A trophozoite (1915, Fig. 6). 

 Figs. 588 and 589. Trophozoites of genus et species incertae. After Mavor (1916a, Figs. 



3d and 3b). X660. 

 Fig. 586. A trophozoite with attached Ceratomyxa acadiensis (1915, Fig. 8). X830. 

 Fig. 587. A trophozoite (1915, Fig. 6). 

 Figs. 588 and 589. Trophozoites of genus et species incertae. After Mavor (1916a, Figs. 



3d and 3b). X660. 

 Fig. 590. Spores of genus et species incertae. After Linton (1891a, Fig. 2). 

 Figs. 591 to 593. Myxobolus hylae. After Johnston and Bancroft (1918). 

 Fig. 591. A transverse section of a heavily infected testis of Hyla aurea, (1918, Fig. 1). 



X about 11. 

 Fig. 592. Different views of normal spores, stained (1918, Fig. 3). X about 800. 

 Fig. 593. Abnormal spores (1918, Fig. 4). X about 800. 

 Figs. 594 to 596. Lentospora dermalobia. After Isliii (1915). 

 Fig. 594. A part of the infected skin of the host (1915, Fig. 2). X140. 

 Figs. 595 and 596. Different views of spore (1915, Figs. 4 and 3). X1450. 

 Figs. 597 to 601. Myxobolus discrepans. Original. 

 Fig. 597. An infected branchial lamella showing the cysts of various size and form. X 



about 4. 

 Figs. 598 to 601. Unstained preserved spores, showing different views. X about 1500. 



