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CLINICAL VETERINARY MEDICINE AND SURGERY. 



membrane. It contained 9 ounces of a perfectly clear limpid fluid, 

 which escaped under pressure on the sac being incised. Scrapings 

 taken from this were microscopically examined. The appearances will 

 be described later. The second cyst (really consisting of the cavities 

 h and c) was perhaps as large in extent, but contained less fluid. 

 Its walls were calcified, and varied in thickness from a quarter to half 

 an inch. Its lining membrane was yellow, and covered with a slimy 

 muco-purulent fluid, while the bulk of its contents was of a similar 

 semi-purulent character, though thinner than the material adhering to 

 the walls. The third cyst was somewhat smaller, and contained about 

 5 ounces of fluid. Its walls were some three eighths of an inch in 

 thickness, but in all material respects it resembled a. The central lobe 

 contained another cyst ; the right seemed free. 



The lungs were emphysematous. They showed in all about thirteen 

 cysts of varying sizes, each having a wall of cartilaginous hardness, 

 containing a clear fluid under pressure, and exhibiting a greyish-white 



Fig. 69. — Debris in cyst fluid, showing echi- 

 nococcus spines and buds or daughter 

 cysts. 



Fig. 70. — Echinococcus scolex, intact. 



crapy lining. The right lung is that represented (see Fig. 68). The 

 largest cyst, which projected prominently, is marked a ; others are 

 marked h, c, d, and e. 



A minute particle scraped from the wall of any of these cysts 

 showed the appearance of Fig. 6g. Myriads of echinococcus spines, 

 singly and arranged in the characteristic saucer forms, float in the fluid, 

 together with secondary and tertiary cysts in various stages of develop- 

 ment. A secondary cyst, more highly magnified, is shown in Fig. 70. 

 By careful lighting this was seen to be bounded by a thin cell-wall 

 containing apparently a glutinous fluid. At the base was the crown or 

 saucer of echinococcus spines {b), which, on rupture of the investing 

 membrane, break up and float singly in the fluid, producing the 

 appearance shown in the preceding figure. Towards the top were two 

 denser bodies (c), apparently undergoing division, while throughout the 

 rest of the free space were numerous daughter cysts (d) arranged 

 in order. 



The heart was enlarged, but otherwise normal. 



