O4 HENRY LESLIE OSBORN. 



cornnta, excepting as regards the oral papillae. On this point and 

 in the figures of Linton, there is a divergence from either B. 

 nodnlosa, for the ventral papillae are transverse and in the form 

 of a horn, and from the Chautauqua form for the four anterior 

 papillae characteristic of both nodnlosa and cornnta are wholly 

 wanting. If the absence of these papillae is a constant character, 

 as at present it must be assumed to be, we then must accept 

 three species for this genus. The coarser features of the organi- 

 zation of the Chautauqua form is described in the following 



i.mm 



FIG. I. B. cornuta, ventral view, compressed, camera lucida X 3- d.fj., duc- 

 tus ejaculatorius ; g.po., genital pore; I.e.. Laurer's canal; oes., resophagus ; ov., 

 ovary; ph., pharynx; r.sem., seminal receptacle ; sp., spermary ; ttt., uterus ; T.S., 

 ventral sucker; v.sem., seminal vesicle ; y.rec., yolk receptacle. 



pages. An account of some points in the minuter structure is re- 

 served for a later article. It will be necessary and convenient at 

 least till more is known of B. anricnlata to adopt a name for the 

 Chautauqua species, and I propose for it the name B. cornuta. 



