THE SPOROZOA 



143 



Wasielewsky ('96) enumerates the following kinds: (1) Paraglyco- 

 gen. These form the bulk of the granules in the Gregarinida ; they 

 are distinct refringent granules of variable size and are usually oval or 

 spherical in form, consisting of a peculiar amyloid substance which 

 Biitschli ('84) regarded as similar to amidon or glycogen. They give 

 characteristic reactions, staining brown to violet with dilute sulphuric 

 acid, and dissolving in potassium carbonate and strong mineral acids. 

 (2) Carminophilous granules. These granules, which were first made 

 out by Schneider ('75), are less numerous than the paraglycogen 

 granules, but like them variable in size and strongly refractive. 



Fig. 79. — Leptotheca agilis Dof., one of the Myxosporidiida. [Doflein.] 



They are easily soluble in ammonia, but are not destroyed by alcohol, 

 embedding in paraffine, etc., and are easily stained by carmine anu 

 many aniline colors, but not at all by haematoxylin. They consist, 

 apparently, of albumen. (3) Fat. These granules are widely dis- 

 tributed throughout the entire group, and have about the same 

 appearance in all types, although they are colored differently in 

 different species. They are soluble in alcohol, ether, and chloroform, 

 and are stained black by osmic acid. In addition to the above gran- 

 ules, which are found in most Sporozoa, there are others which have 

 been found hitherto only in certain subdivisions. In the Gregarinida, 

 pyxinine granules and protein crystals have been observed in certain 

 species, the former by Frenzel ('85) in Pyxinia, where they appar- 



