244 ILLINOIS BIOLOGICAL MONOGRAPHS [482 



EXPLANATION OF PLATE 



Figs. 412 to 416. Spores of Myxobolus oblongus. Figs. 412 to 414, After Gurley (1894, 

 PI. 26, Fig. 6). X2300. Figs. 415 and 416. After MiiUer (1841, Fig. 9). 



Figs. 417 and 418. Spores of Myxobolus transovalis. After Gurley (1894, Pi. 29, Fig. 1). 



Figs. 419 and 420. Spores of Myxobolus obesus. After Balbiani (1884, Fig. 39). 



Fig. 421. Spores of Myxobolus cycloides. After Miiller (1841, Fig. 3). 



Figs. 422 and 423. SY>OK?,oi Myxobolus anurus. After Cohn (1895, Fig. 25). X1500. 



Fig. 424. Spores of Myxobolus sp. X700. After Butschli (1882, PI. 36, Fig. 23). 



Fig. 425. Myxobolus sp. After Gurley (1894, Pi. 28: Fig. 4a). X about 1500. 



Figs. 426 to 429. Spores of Myxobolus sp. After Miiller (1841, Fig. 4). 



Fig. 430. A vegetative form of Myxobolus cyprini. After Doflein (1898, Fig. 112). 



Figs. 431 and 432. Spores of Myxobolus cyprini. After Doflein (1898, Figs. 113 to 115). 



Figs. 433 to 436. Myxobolus neurobius. After Schuberg and Schroder (1905). 



Figs. 433 and 434. Longitudinal and transverse sections thru infected nerve fibres (1905, 

 Figs. 2 and 4a). X520. 



Figs. 435 and 436. Spores (1905, Figs. 5 and 6). Comp. oc. 12 and imm, obj. 2nun. 



Figs. 437 to 441. Myxobolus aeglefini. After Auerbach (1906a). 



Fig. 437. A cyst in the sclerotic cartilage of the eye of Gadus aeglefini (1906a, Fig. 2). 



Figs. 438 and 439. Spores (1906a, Figs. 5a and 3d). X about 1320. 



Figs. 440 and 441, Abnormal spores (1906a, Figs. 5b and 5c). X about 1320. 



Figs. 442 to 445. Myxobolus gigas. After Auerbach (1906b). 



Fig. 442. A part of the section of a cyst (1906b, Fig. 1). 



Figs. 443 to 445. Spores (1906b, Figs. 3a, 3c, 5 and 3b). X about 850. 



Figs. 446 and 447. Spores of Myxobolus volgensis. After Reuss (1906, Fig. 1). X2000. 



