ADDITIONAL L.M.B.C. TURBELLARIA. 155 



cellular shell (?) glands. The germ glands lie entirely in 

 the anterior third of the body, their proximal ends con- 

 verging forward to open into the posterior part of the 

 atrium in company with the yolk glands. Their distal 

 halves are bent at an acute angle to the proximal halves, 

 the apex pointing forwards and upwards, so that in a 

 pressure preparation the glands present the appearance 

 of two V's, one on either side of the body, occupying 

 much the position that the testes formerly did. 



In minute structure they conform to the type which is 

 so distinctive of Graffilla, the individual ova being some- 

 what flattened and suggesting rouleaux of coins. The 

 ducts of the yolk glands lie internally (mesiad) to the 

 germaria and open into the posterior w T all of the atrium. 

 A short distance behind the atrium they branch, and by 

 complex branching and anastomosing form a more or less 

 complete sheath around the gut extending from the brain 

 to the tail (fig. 4). Underneath the epidermis is the same 

 extraordinary system of supposed excretory tubes that 

 has been observed in other species of the same genus. 

 They ramify and anastomose all over the dorsal surface in 

 a most complex manner ; and, as in the other members 

 of this genus, no flame cells are visible. On either side 

 of the body, running from anterior to posterior end, is a 

 larger tubule, which presents a slight dilatation about the 

 middle of its length. 



The chief characters which distinguish this species 

 from the other four members of the genus, are the position 

 of the genital pore, the form of the germ gland and the 

 penis, and the possession of pigment spots in the paren- 

 chyma. From G. muricicola it differs in the absence of 

 Bohmig's " Haftapparat " or " Bohrapparat," in the form 

 of the body, the position of the genital opening, the form 

 of the germ glands, the fact that the eyes are embedded 



