IGG 



lamellar structure of the bnthria is not shown well either 

 in this or in any other specimen of the species that I have 

 seen. Instead one finds that the face of each bothria is 

 divided up into a number of separate loculi by means of 

 one axial, and several transverse ridges. Only at the 

 tip of one of the bothria are the transverse ridges con- 

 tinued across the whole face of the former. Five or six 

 loculi on each side may be counted and there are also 

 several in the broader, posterior, rolled-up part of the 

 bothrium, but the number and shape of these latter 

 cannot easily be seen. 



Fig. 19. Eche7teibothriuvi variabile, van Beneden. Varieties A and 

 B. Mag. about 40 dia. 



V a r i e t y B. 



This variety, which is represented in fig. 19 B was a 

 very common one. The myzorhynchus is always more 

 rounded and club-like than in Var. A, and I have not 

 observed any indications of a sucker at its tip. The 

 bothria are thin and leaf-like, and are borne on compara- 

 tively long pedicels ; their anterior extremities are more 



