Thus, starting from the two shallow pits, one dorsal and the other central, in the simplest forms, we find them becoming two elongated suckers (bothria) in the large family Bothriocephalidae (fig.
It seems probable that these suckers are not the true " bothria " but are developed from accessory suckers, the bases of which have disappeared almost completely.
C q t;: pm .-..,,?i are transferred into two tubes (Solenophoridae); and by the closure of the lower aperture reconstituted into two suckers, the margins of which are produced and folded so as to resemble the leaf-like outgrowths of the next group. In this division (Tetraphyllidea) four suckers or bothria are developed on the scolex, but their cavities are extremely shallow and their lips extremely mobile and variable in shape.
Cordatus, showing the bothria; X 5 (from Leuckart).
Scolex with two " bothria," or modification thereof, usually devoid of hooks.
How would you define bothria? Add your definition here.