250 



ENTO'/oA. 



depends upon a correct appreciation of tlie relative structure, 

 clieinical constitution, and disposition of tlie calcareous corpuscles 

 as observed in tlie various groups of Entozoa in wliicli tliey are 

 knoT^^l to abound, I have investigated the characters of these 

 singular bodies with very considerable care. In the Gysticercits ex 

 Pofamochoero peniciUato (as I originally termed it) I did not detect 

 any of these bodies within the walls of the caudal vesicle ; but 

 they were extraordinarily abundant within the head and neck, and. 



FiCr. 55. — Enlarged view of the head of Cysticercus temticollis from the Red Eiver Hog {Potamo- 

 choerus fenicillahis) ; a, b, c, d, e, isolated calcareous corpuscles of various shape, and/, cf, h, i, 

 k, I, m, one of the corpuscles gradually dissolving under the action of liquor ^potassw (X 220 

 diam.) — Original. 



by their highly refracting properties, imparted to the tissues (when 

 viewed by transmitted light) a dark pigment-like hue, almost 

 obliterating the limiting membranes of the inverted head. They 



