TUMORS. 247 
of hydatic cysts.. Total extirpation is the best way. When impracticable, 
remove all that can be taken off, use the curette on the rest. 
Rivolta, Bassi, Gotti, Perroncito, and Vigezzi have described, in the 
case of horses, donkeys and dogs, fibrous tumors of the connective 
tissue due to spiropterus reticulus. They are frequent on the anterior leg, 
at times compress tendons or nerves and give rise to lameness. Tschu- 
lowski has shown that among horses which are the carriers of the spiropterus 
reticulus the embryos are ordinarily found in lymphatic vessels, the peri- 
vascular connective tissue and the articular and tendinous synovial mem- 
branes of the extremities. (See Raillet, Zraz# de Zoologie médicale ; and 
Neumann, Zreatise on Parasitic Affections of Domestic Animals.) 
The extirpation of the tumors is the only proper treatment. 
