50 



specimens from Godhaven, North Greenland. Of 

 these, but one came from the human intestine ; the 

 remainder being from dogs, in which animals the 

 parasite exists quite abundantly. 



It is a foot in length ; its head (PI. III. fig. 5, A) is 

 heart-shaped or obcordate, short and broad, and sits 

 upon the body, without the intervention of a long 

 neck. The segments (PI. III. 5, B, a) are distinct 

 from the very commencement near the head ; and so 

 rapidly do they increase in width, that the anterior 

 part of the body becomes lancet-shaped. About fifty 

 joints are immature ; Leuckart, in the largest speci- 

 men, counted a total of 66 joints. The calcareous 

 corpuscles of the skin are more numerous than in the 

 B. latus (Aitken). The genital openings are, as in 

 the B. latus, serially arranged in the centre of each 

 joint ; but the uterine lateral processes are more 

 numerous (Cobbold, Aitken). 



This completes the description of the adult forms 

 of these parasites found in the human body : that of 

 the Cysticerci now follows. 



For the description of the Cysticercus cellulose, I 

 refer the reader to the portion on the anatomy of the 

 Cysticerci. 



The Cysticercus Tcenice mediocanellatce (PI. I. fig. 

 8) was for some time unknown ; the question having 

 been raised, as to whether it might not be, in the 

 adult form, a T. solium which had lost its hooks from 

 old age, until the experiments of Leuckart and Mos- 

 ler in Germany, and Simonds and Cobbold in Eng- 

 land, by feeding animals with the sexually mature 





