PARASITOLOGY. 209 
Fig. 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 protozoon, Coccidium tenellum. The 
glands of the mucous membrane have all disappeared except small 
remnants indicated by b; ¢, 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, : Wan Se 
Sarcocystis MirescHert (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. 
