152 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Naturgesch. v. lii., pt. 1, p. 305, 1886), from the liver of 

 Teredo, under the name of Graffilla braunii. A valuable 

 account of the anatomy of the first two species is given 

 byBohinig; (2). The genus Graffilla has not hitherto 

 been found in British waters. 



Description : — Length 1 — 25 mm. Breadth *5 — 1 

 mm. Colour greyish yellow to reddish yellow, very opaque, 

 in favourable pressure preparations groups of olive brown 

 pigment granules (fig. 5) are visible evenly distributed 

 over the body. Sections prove that they are situated in 

 the parenchyma. Form, cylindrical in section ; outline 

 of body varies according to condition of genital glands ; 

 in small, 1 — 1*8 mm. long individuals, in which male 

 organs alone are visible, it is elongate with the greatest 

 breadth behind middle of body, and posterior third tapered 

 off into a tail ; in larger specimens with ovaries and yolk 

 glands highly developed the general outline is stouter, and 

 the " tail " usually cannot be recognised (fig. 6). 



Mouth on ventral aspect of anterior end of body, being 

 in fact an excellent example of a terminal mouth. It 

 leads into a pharyngeal sack, quite obvious in all sections 

 of well preserved specimens, in which lies the small 

 doliiform (v. Graff) pharynx, which can be protruded by 

 the living animal to a certain extent. The pharynx 

 measures yg — y 1 - of total length of body. 



Nothing comparable to the " Haftapparat " of Bohmig 

 is present in this species. The interior of the pharyngeal 

 sack is not ciliated. Eyes, two ; small, reniform, provided 

 each with three or four small lens cells, they are com- 

 pletely buried in the substance of the brain as will be seen 

 in fig. 7. The body is uniformly ciliated, the cilia are 

 short and comparatively thick, the cuticular layer of the 

 epidermis is also thicker than is usual among the Turbel- 

 laria. Around the mouth I observed a few cilia longer than 



