ON A NEW CETTODE LARVA PARASITIC IN MAN. 17 



be, as it frequently is, represented by an unevenly granular sub- 

 stance inclosing a compact core of varying size, which core is the 

 remnant of the original body in an unchanged condition. In a 

 more advanced stage of disintegration the core disappears altoge- 

 ther and the body is entirely changed into a conglomerate-like 

 mass consisting of granules and spherules of various sizes (r. n., 

 figs. 17, 20, 22). This change in character of the body is ac- 

 companied by a considerable increase in bulk. Moreover, after 

 tlie setting in of the disintegrating process, the mass comes to 

 lie in a vesicular space which is delimited from the parenchyma 

 by a sharply defined, structureless membrane. The vesicle is 

 generally roundish or oval, measuring 100-300 // in diameter ; 

 occasionally it is found drawn out into a canalar shape of con- 

 siderable length (as on the left of fig. 20). The bounding wall 

 is at first thin but later so increases in thickness that it comes to 

 resemble in a remarkable degree the cuticula of the worm. Now 

 and then I have noticed on its inner surface fine hair-like pro- 

 cesses, but this appearance I am inclined to regard as having 

 been caused by a part of the contents sticking to that surface. 

 The conglomerate-like mass either entirely fills up the internal 

 space or leaves between it and the wall a peripheral space, which 

 in sections is quite clear but may sometimes show traces of a 

 very finely granular and faintly stained coagulum. 



As to the significance of the body or substance described 

 above, the most likely explanation seems to be that it represents 

 a nutritive matter held in reserve, physiologically comparable to 

 the fat of higher animals or to the amylum in plants. The 

 storing up of the matter probably stands in relation with the 

 high proliferating power possessed by the present worm. The 

 reactions towards reagents indicate that the substance is not ex- 



