ECHINOCOCCUS SCOLICIPARIENS. 199 



the bulb were in the normal state, the right eyeball was strongly 

 convex, slightly hardened, tense, and staring; the sclerotic coat 

 and the cornea were normal, the iris brown, coated in isolated 

 spots with yellow exudations of lymph, the pupil distorted, the upper 

 segment of the lens somewhat turbid, and deeper down presented 

 a dingy yellow and widely diffused turbidity. The left eye- 

 ball, which resembled the right one in form and hardness, had a 

 pale-blue iris, with small superficial vessels. The obscured lens 

 was pressed downwards, the place where the lens ought to have 

 been was filled with a yellowish-brown mass, and only the upper 

 segment of the lens was perceptible. Dissection : When the 

 eye was divided into two segments by a transverse incision, it 

 was found that a fine white membrane pressed into the incision, 

 between the cut choroid and sclerotic coats. The choroid itself 

 was brownish, destitute of pigment, and rich in varicose vessels ; 

 the retina appeared to be shrivelled up with the vitreous body 

 into a white, reddish-brown mass, was quite cord-like at the 

 entrance of the optic nerve, increased in breadth and circum- 

 ference anteriorly, became folded, and was intimately amalgamated 

 with the corona ciliaris and processes ciliaris. In the space 

 between the retina and the choroid sat the white vesicle, of 

 which it has already been stated that it pushed itself out through 

 the incision. When the external, white, firm, and slightly trans- 

 parent envelope of this vesicle, which sprang from the middle of 

 the lower surface of the retina and spread itself in a circle round 

 the retina, with its two sac-like extremities meeting above, 

 was carefully opened, a little serous fluid issued, and at the 

 same time a delicate bluish-white membrane appeared enclosed 

 within the first-mentioned envelope. When this was torn open, 

 a serous fluid also issued from it, which contained a quantity of 

 small, round, oval or olive-like vermiform corpuscles, and the 

 latter were, as perceived, attached to the inner surface of the 

 delicate membrane. On some of them four small suckers were 

 distinctly seen, but no circlet of hooks was detected. They 

 formed a perfectly homogeneous mass without perceptible internal 

 structure, and were regarded as an Echinococcus. 



From the description just given it follows distinctly that this 

 was an Echinococcus of the first species, or scolicipariens, and 

 that I am certainly in the right if I do not refer it to our second 

 species. 



It is, however, to be regretted that not a single one of these 



