SEA-FISHERIES LABORATORY, 



93 



represented in fig. 4, was 110 mm. in length. At. nearly 

 all points the transverse section of a proglottis is circular. 

 The proglottides immediately behind the neck were 019 

 mm. in width by O'Oo in length ; and the terminal ones 

 were about 092 mm. in width by 0*48 mm. i*i length. 

 Prox. p rqx. p ro:c . 



c- 1 ) 



22. Segments 



r^*y^rh 



n 



Fig. 9. Echeneibothrium variabile, van Beneden. Parts of a strobila, 

 the posterior proglottides being on the right. 



Echeneibothrium dubium, van Beneden 1 



I have already figured t this species as a variety of E. 

 variabile. Further examination of a number of specimens 

 has, however, shown that this " variety " is, in all proba- 

 bility, the species referred to here. It is not always possible 

 to observe the os in the myzorhynchns, and occasionally 

 the latter structure is so greatly contracted as to present 



* " Memoiic sur les Vers Intestinaux." Supplement to Tome II, 

 Comptes Rendus, Acad. Sci. Paris, 1858, p. 122, PI. XV. 



f Fourteenth Ann. Rept. Lancashire Sea} Fish. Laby. Trans. 

 Liverpool Biol. Soc., Vol. XX, 190G, p. 310, fig. 19. 



