14 ENTOZOA FOU^D IN MAN. 



nated in the caudal vesicle, and the echinococcus is 

 tlien regularly oval ; the rostellum is also invaginated 

 amongst the suckers, like the retracted finger of a 

 glove, so that the hooks which most frequently have 

 their claws directed backwards are to be found 

 behind the suckers. 



Fig. 3.* 



The echinococci are developed in the substance of 

 the germinal membrane, or rather in its expansions ; 

 several of them spring up together and are connected 

 with the membrane by means of a little cord 

 [funiculus), which is inserted into a depression on 



^ Explanation of Figure 3. — Echinococci observed in man. 

 1. A group of echinococci, still adherent to the germinal mem- 

 brane by means of funiculi ; magnified forty times. 2. An echino- 

 coccus magnified 107 times ; the head is invaginated into the 

 interior of the caudal vesicle ; the funiculus is attached inferiorily. 

 3. The same, flattened ; the head is retracted, and the suckers, 

 hooks, and calcareous corpuscles are shown. 4. An echinococcus 

 magnified 107 times ; the head is protruded from the caudal 

 vesicle. 5. The circlet of hooks, magnified 350 times. 



