684 



DEFINITION OF BOTHRIOCEPHALUS LATUS. 



and flat, like a ribbon, especially towards the sides, while the median 

 portion, which contains the uterus, projects as a sort of pad. The 



FIG. 858. Head of Bothriocephalu* latus. 

 ( x 8.) A, From the flat side ; B, From the 

 margin. 



FIG. 357. BotJiriocephalut latu* 

 (nat. size). 



anterior end of the "body is sometimes much contracted, and is then 

 relatively broad ; sometimes, however, elongated and thin, or even drawn 

 out into a thread-like neck, so that the liead, measuring 2 to 5 mm. in 

 length and 1 mm. in breadth, is marked off as an elongated swelling. 

 Viewed from the side, the head usually has, during quiescence, the form 

 of a mw*e or less elongated oval, with rounded, or occasionally with some- 

 what pointed, anterior end. A shallow furrow, which extends along tlw 

 margin of the latter, is continued posteriorly directly into the suctorial 

 groove, ivhich can be traced to the hinder end of the head in the form of 



