306 



THE AMERICAN MONTHLY 



[Sept. 



much less muscular, and in fact more like Taenia solium, 

 from which it differs, however, in many evident respects. 

 A positive diagnosis of the species may be made from 

 these terminal segments alone, by the size and shape, 

 which, as the table appended to the article shows, are 

 sufficiently unlike corresponding parts in the two famil- 

 iar forms of Taenia to be distinguished without great dif- 

 ficulty. 



The most striking peculiarity of the new species, how- 

 ever, is the head. Unfortunately, this was present only 

 in one specimen. The long, very slender neck has no 

 region which fails to show the boundary lines of the pro- 



FiG. 1. — Two segments from end of chain. Taenia confusa n. p. Nine-tenths natural size 

 (Original.) 



Fig. 2.— Head of Taenia confusa n. sp. Highly magnified, x about 12.'). Drawn with Abbe 

 camera. Leitz Oc. 2, Obj. 5. (Original.) 



glottids. It is crowned by a small head (Fig. 2), which 

 measures only 0.3 mm. in diameter. The four suckers 

 are distinct, but not prominent, and produce no apparent 

 break in the outline of the head. Most striking, however 

 even under a low power, is the rostellum, which lies 

 drawn into a pit at the anterior apex of the head. It is 

 thimble-shaped and measures 0.05 mm. wide by 0.07 mm. 



