HENRY LESLIE OSBORN. 



surface features of the animal, but deep-seated in their origin, 

 and are entitled to be regarded as of considerable importance 

 from a taxonomic point of view. 



The lateral papillae are unmistakable organs not likely to be 

 overlooked by an observer, whereas the ventral papillae of B. 

 nodulosa are inconspicuous and might easily escape notice, a 

 point discussed by Looss ('94, p. 34). In B. anriailata I looked 

 very closely for the dorsal papillae without finding them and I am 



FIG. 7. Ventral view of a specimen in which the uterus is most fully developed, 

 the vitellaria are omitted from the right side. 



convinced that they are absent from the specimen I saw, in which 

 respect my observations confirm those of Linton as indicated in 

 his figures, '98, PI. XLV., Figs. 1-7. 



There is a short pre-pharynx, a small pharynx, about 0.05 

 mm. long, a short oesophagus, its walls very strongly muscular 

 and surrounded by glandular cells. The forking of the intestines 

 is thus close to the pharynx, a point different from B. nodulosa. 

 The intestines are simple and long, reaching to near the hinder 

 end of the bod}-. They are lined with epithelium cells whose 

 outer ends are elongate and whose tips extend into the cavity of 

 the organ. Circular and longitudinal muscle fibers are present 

 in the wall. 



