EXPLANATION OF PILATE: 
Fic. 7.—Balanobothrium tenax, n. gen., n. sp. 
View of head; the collar shown transparent to 
exhibit the base of the head bulb, X 17. 
,, 11.—Diagram of a vertical section through the head of 
the same species when contained within a sac 
formed by an outgrowth from the intestine of the 
host, 7.w., wall of the intestine; 7.d., saccate 
diverticulum from inner wall of intestine; /.D., 
head bulb of the cestode; 0.c., its bothridial 
collar; s., anterior end of strobila. 
,, 12.—A ripening proglottis from the same species showing 
the rosette-like ovary with vagina and penis 
sheath anteriorly on the left, « IT. 
,, 13.—Tetrarhynchus annandalet, n. sp., X 83. 
,, 14.—Head of same, x 16. 
Fics. 15 & 15a.—Same. Hooks of proboscis, highly magnified. 
