CYSTIGBRCUS, 



125 



Those attached to the mesentery were also encysted ; but in these 

 instances the envelope appeared to be merely a production of the 

 peritoneal membrane itself, and not an abnormal product, such as 

 had clearly resulted from inflammatory action both in the case of 

 the liver-cyst and in the fibrous capsule of the Gysticercus from the 

 Wart Hog. The Cysticerci of the Red River Hog, when withdrawn 

 from their enveloping membranes, exhibited a more or less oval or 

 elliptic outline ; but the drawing here given (fig. 27) shows only the 

 neck (a), the body(&),and part of the largely developed caudal vesicle 

 (d). The head, being inverted and enclosed within the upper part of 

 the neck, could only be found after a prolonged dissection and un- 



FiG-. 27.— Upper part of Cysticercus tenuicollis ; from the Eed Eiver Hog (Potamochoerus penicil- 

 latus); natural size. — Original. 



folding of the parts. When this was done, and the head placed under 

 an inch objective, it was found to display the usual four sucking 

 disks, and a double coronet of hooks. The margin of the neck was 

 bordered by a double contour, the parenchymatous substance being 

 everywhere studded with a multitude of calcareous corpuscles, which 

 were not limited to the neck itself, but were also present in the head. 

 To these structures I shall again have occasion to allude, but in the 

 meantime I only take notice of the body and caudal vesicle of our 

 Cysticercus. The former was about half an inch long, and somewhat 



