Sonw Variations in Hymenolepis diniinuta 13 



a few thick, rounded lobes. The anterior margin of this gland is 

 constantly very convex, while the posterior may show two, three, 

 or four lobes projecting backward. 



Ransom has given measurements for the egg of this form from 

 both the rat and man. The outer shell varied from 64 to 80 /^ ; 

 the inner, 24 by 20 /x to 36 by 28 fx ; the hooks, 14 to 16 ju,. A few 

 smaller eggs with thicker shell measured 40 by 40 fx to 40 by 48 ft. 

 (Ransom, 1904). All my measurements have easily fallen within 

 these limits except a very few of the largest, where the external 

 shell measured 84 ix, a figure exceeded by Grassi's maximum of 

 86 IX. I have found "sterile" proglottides quite frequently, but in 

 the specimen I have described they do not seem to be so common. 



LITERATURE CITED 



Grassi, B. 



1888. Taenia flavo punctata Weinland. Taenia leptoccphala 

 Creplin, Taenia diniinuta Rudolphi. Atti. R. Accad. d. 

 sc. Torino., 23 :492-5oi ; i tav. 



Magalhaes, P. S. de. 



1896. Ein zweiter Fall von Hymenolepis diminuta Rudolphi 

 (Taenia Havopunctata Weinland) als Menschlicher Par- 

 asit in Brasilen beobactet. Centr. Bakt. u. Par., i Abt., 

 20 :673-74. 



Packard, F. A. 



1900. T. HaTopunctata with the description of a new specimen. 

 Jour. Amer. Med. Assn., 35:1551. 



Ransom, B. H. 



1904. An account of the Tapeworms of the Genus Hymeno- 

 lepis Parasitic in Man, including reports of several new 

 cases of the dwarf tapeworm {H. nana) in the United 

 States. Bull. 18, Hyg. Lab., Washington, 138 pp. ; 130 

 figs. 



Weinland, D. F. 



1858. Human Cestoides. An essay of the Tapeworms of Man. 

 Cambridge. Mass. ^ 



H7 



