TRICHINAE. 
497 
of the sac, instead of being, as I had supposed, a fibrous capsule, 
was a true cuticle turned wrong side out. It was lined with 
well-formed hairs about an inch in length and dark colored. 
Now, the question with me is, was it a true melenotic tumor or 
more of the nature of a demi-cyst ? 
The microscope showed the pulp to contain large quantities 
of fat drops and epithelial cells and brown pigment granules, 
as well as calcareous deposit. 
The animal never had sustained any injury of which I could 
learn. The tumor had been there for three years, with no per¬ 
ceptible change, and never had shown the least soreness or in¬ 
flammation. 
TRICHIM, 
■j A LECTURE DELIVERED BEFORE THE STUDENTS OF THE 
AMERICAN VETERINARY COLLEGE. 
By F. S. Billings, V. M. 
(Continued frontpage 449.) 
The Intestinal Trichinae. 
So long as the trichinae remain encapsulated in the fibres of 
the muscles, their condition remains unchanged. They make no 
progress in their development, irrespective of the number of 
years that they may have been encapsulated. They have been 
seen in an active— i. e ., capable of progressive development under 
conformable circumstances, yet encapsulated—condition, 13, 20, 24 
years from the time at which their invasion took place. 
(a.) In 1861 a woman was admitted into the hospital at 
Altona, a suburb of Hamburg, Germany, suffering from a cancer 
of the breast, which had been developing for some twelve years. 
On removal of the same, and subjecting portions of its tissues to 
microscopical examination, the presence of trichinae in the mus¬ 
cular fibres was manifested. On inquiry, it was ascertained that 
in 1856 the woman resided at Davenport, Iowa, where she was 
taken suddenly very ill, gastric and rheumatic phenomena being 
