178 



GESOPHAGOSTOMA. COLUMBIANUM, Curtice. 

 Plate XXVI. 



Fij;. 1. A piece of mucous membrane taken from the caecum, surface view, natural 

 size. The patch of dots scattered uniformly over the surface represents 

 intestinal glands; the irregularly scattered larger dots and elevations are 

 the young worm tumors in their first stages. 



Fig. 2. A section through a worm tumor in its younger stage : a, a, a, mucous mem- 

 brane ; h, submucous connective tissue, in which are c arteries and d veins ; 

 e, the tumor, which is made of connective tissue cells and their nuclei, 

 packed closely together ; near its center is the worm cavity/, with a piece 

 of the worm, which is surrounded by a section of a special capsule; out- 

 side of this is a thick membrane, formed from the surrounding material. 



Fig. 3. Small tumor dissected from the ca-cum : a, the outside capsule filled with 

 Uuid, in which is b, a hard, cheesy mass : c, the worm in its capsule, which 

 has been pressed out of the cavity in the mass h. This presents a more 

 advanced stage ot the disease than fig. 7, Plate xxv. 



Fig. 3a. The ruptured capsule. 



Fig. 3&. The worm near the end of its second stage about to moult. 



