242 ILLINOIS BIOLOGICAL MONOGRAPHS [480 



EXPLANATION OF PLATES 



Figs. 379 to 385. Myxobolus pfeifferi. 



Figs. 379 and 380. Parts of section thru cyst. After Keysselitz (1908a, PI. 15, Figs. 1 and 2). 



Fig. 381. A spore. After Thelohan (1895, Fig. 77). X1500. 



Fig. 382. An optical section of spore. After Keysselitz (1908a, Fig. A). 



Fig. 383. A spore treated with Lugol's solution. After Keysselitz (1908a, PI. 14: Fig. 92). 



Fig. 384. A spore with extruded filaments. After Keysselitz (1908a, Fig. C). 



Fig. 385. A stained young spore. After Keysselitz (1908a, PI. 14, Fig. 81). 



Fig. 386. A spore of Myxobolus dispar. After Thelohan (1895, Fig. 86). X about 1500. 



Figs. 387 to 389. Spores of Myxobolus ellipsoides. Fig. 389. An abnormal spore with six 



polar capsules. After Thelohan (1895, Figs. 112, 113 and 115). 

 Fig. 390. A part of the infected intestine of Mugil auratus, showing cysts of Myxobolus 



exiguus. After Parisi (1912, Fig. 9e). X about 3. 

 Fig. 391. A spore of Myxobolus exiguus. After Thelohan (1895, Fig. 98). X 1500. 

 Figs. 392 to 395. Spores of Myxobolus exiguus. After Parisi (1912, Fig. 9). X2500. 

 Fig. 396. A spore oi Myxobolus oviformis. After Th61ohan (1895, Fig. 81). X1500. 

 Figs. 397 to 398. Spores of Myxobolus mUlleri. After Thelohan (1895, Figs. 96 and 97). 



X1500. 

 Figs. 399 and 400. Spores of Myxobolus mulleri. After Blitschli (1881, Figs. 1 and 2). 

 Fig. 401. A spore of Myxobolus mulleri in cone, sulphuric acid. After Biitschli (1881, Fig. 6). 

 Figs. 402 and 403. Abnormal spores of Myxobolus mulleri. After Biitschli (1881, Figs. 9 



and 8). 

 Figs. 404 and 405. Spores of Myxobolus lintoni. After Linton (1891, Figs. 3 and 5). 

 Fig. 406. Diagram of the cross section of a spore of Myxobolus lintoni. After Linton (1891, 



Fig. 8). 

 Fig. 407. A spore oi Myxobolus lintoni with extruded polar filaments. After Linton (1891, 



Fig. 10). 

 Fig. 408. A stained spore of Myxobolus lintoni. After Gurley (1894, PI. 26, Fig. 7). X 



about 2000. 

 Figs. 409 and 410. Spores of Myxobolus globosus. After Gurley (1894, Pi. 26, Fig. 7). 



X about 2900. 

 Fig. 411. Spores of Myxobolus inaequalis. After Miiller (1841, Fig. 6). 



