PARASITOLOGY. 



209 



Pigr. 77. 



Fig. 78. 



Fig. 77. — The transverse section through the caecum of a chick 

 that died of white diarrhoea; a, muscular layer which, at some 

 points, is invaded by the protozoori, Coccidium tenellum. The 

 glands of the mucous membrane have all disappeared except small 

 remnants indicated by b; c, granular degenerated mass from dis- 

 solution of the mucous membrane, magnified 100 times. 



Fig. 78. — The area in the circle indicated by b in Fig. 21, magni- 

 fied 900 times. The letters indicate the protozoon parasite in 

 various stages of development; a, oocyst; b, first stage of sporo- 

 blast; c, first stage of sporozoit; d, the schizont showing within 

 the merozoits. These are surrounded by a disintegrating cell mass; 

 e, shows white blood cells (polymorphonuclear neutrophiles). — 

 From Kaupp's Diseases of Poultry. 



Sarcocystis Miescheri (Miescher). 



Synonyms. — Utricles of Miescheri; Rainey's cor- 

 puscles. 



Distribution. — Common in the United States; dis- 

 covered in 1843 by Miescher. In sections of the 

 oesophagus of the hog and sheep examined in the 

 laboratory of the Kansas City Veterinary College 

 these parasites have been found to be very common. 



