PROTOZOA 



103 



sorbed through the surface: the shape of the body is then simple 

 (Figs. 5, 87 A). Nearly always, however, there is a mouth. In some of 

 the lower genera this is anterior and terminal, or nearly so (Fig. 89 A), 

 but usually it is removed to one side of the body (Fig. 87 E). This side 

 is then said to be "ventral", and that opposite to it is ** dorsal". 



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III 

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m 



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B 



Fig. 83. Sarcocystis lindemanm, from the vocal cords of man. After Baraban 

 and Saint-R^my. A, Longitudinal section of muscle fibres, showing the 

 parasite in situ in a fibre, x 300. B, Enlarged portion of outer region of para- 

 site, showing the striated wall, and some of the compartments which contain 

 the spores. C, A single spore, x 1600. m. muscle fibre; w. wall of parasite. 



The mouth, either is merely a soft patch of exposed endoplasm or 

 possesses a gullet (p. 19). In a relatively few cases (including all those 

 in which the mouth is terminal and a few of those in which it is 



