EXPLANATION “OF (PAu Wax 
Fic. 1.—Prosthecobothrium urogymni, n. sp. 
Lateral view of head, x 50. 
2.—Head of the same, viewed from the anterior aspect, 
55. 
3.—Outline sketch of proglottides of the same from 
median region of body, X 4o. 
4.—Balanobothrium tenax, n. gen., n. sp. 
Lateral view of the head of an immature individual 
showing collar turned back. Sketched from life. 
5.--A second view of the same, to show another form 
frequently assumed when alive. 
6.—A fully mature individual of the same _ species. 
Natural size. 
8.—View showing the relative positions of each pair 
of uncini with the minute acetabulum anteriorly 
and the tumid ridge posteriorly, X 200. 
g.—An uncinus from a young individual of the same 
species. 
1o.—An uncinus from an adult individual, x 800. 
+) 
2) 
