THE SPOROZOA 



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body is divisible into two distinct regions, a denser external 

 ectoplasm, clear and very finely granular, enclosing a more fluid 

 endoplasm, which is opaque and coarsely granular (Figs. 83 and 84). 



FIG. 82. 



Section of the wall of the urinary bladder of a tench, showing Myxobolus ellipsoides, Thel. 

 (myx), occurring in the condition of diffuse infiltration between the bundles of connective tissue 

 (c.t). (From Wasielewski, after Thelohan.) 



The ectoplasm is the seat of movement, and the pseudopodia take 

 origin from it, but it also has a protective function, well seen in the 

 forms inhabiting bile or urine, which disintegrate if the ectoplasm 



set 



Fio. 83. 



Trophozoite of Chloromyxum leydigi, 

 Ming. (par. Scyllium, Raia, etc.), in a 

 condition of activity, ect, ectoplasm ; 

 ps, pseudopodia ; end, endoplasm ; 

 y, yellow globules in the endoplasm ; 

 sp, spores, each with four pole capsules. 

 (After Thelohan, x 525.) 



Trophozoite of Sphaerospora divergens, Thel. (par. 

 Blennius and Crenilabnts). Letters as in Fig. 83. 

 (After Thelohan, from Wasielewski, x 750.) 



be damaged. The endoplasm, besides vacuoles, granules of various 

 kinds, and sometimes crystals, contains the nuclei, and spores in 

 all stages of development. 



