x 
Ne) 
MR. R. OWEN’S DESCRIPTION OF A MICROSCOPIC ENTOZOON. 
. One of the cysts, magnified 20 diameters, containing two Trichine: the ex- 
tremities of the cyst are more than usually elongated. 
. Another cyst, magnified 20 diameters, containing a single Trichina, with one 
of the extremities of the cyst slightly expanded and transparent. 
. Another cyst, magnified 20 diameters, torn open, and the Trichina with the 
surrounding granular secretion let out. 
. The Trichina, magnified 200 diameters. 
a. The head, showing the linear mouth. 
b. The tail. 
. The head of another specimen of Trichina, magnified 300 diameters, seen by 
a Wollaston’s doublet. 
The middle of the body, seen through the same microscope. A granular 
substance, inclosed in a pellucid integument, is all the structure that this 
view discloses. 
. The tail of the same specimen. 
. Acyst, with calcareous parietes, magnified 20 diameters, filled with opake 
matter. 
