242 



DISCOVERY REPORTS 



unreliable for diagnosis are slight or even moderately large differences in the shape of 

 the ganglion in preserved specimens. 



Contrary to Michaelsen, I found no copulatory glands in the segments behind the 

 clitellum. 



Each testis is divided into tw^o lobes, one extending backwards ventrally, the other 

 disposed vertically by the side of the alimentary canal, but the junction of the two is very 

 broad and the lobes show little independence, unlike the numerous club-shaped lobes 

 of the testes in the genus Lmnbrki/his, which are united only at the origin of their very 

 attenuated stalks. The lower lobe may again show an incipient division. The male 

 funnels are about three times as long as broad. 



Fig. I 



gi-' 



Fig. 



F'g- 3 

 Marionina georgiana; cerebral ganglion. 

 Fig. 2. Marionina georgiana; spermatheca, drawn from a whole mount; the full number of gland masses 

 attached to the duct were not visible, only one (gl.) being well seen. 



Fig. 3. Marionina georgiana; section through duct of spermatheca. A portion of the duct is cut lengthwise, 

 the broader, ectal part of the duct (ec.) being below, the narrower, ental bent portion above (en.). A number 

 (seven) of aggregates of gland cells (gl.) cluster round the ectal portion ; the cells in these stain considerably 

 less heavily than those of the duct itself, x 500. 



The spermathecae (Figs. 2, 3) have an ovoid or somewhat irregularly pyramidal 

 ampulla, in length loo/Li, prolonged at the ental end into a canal leading by a patent 

 passage into the oesophagus. The tubular duct is well marked off, bent in the form of the 

 letter S, and allowing for the bends is not far from twice as long as the ampulla; its 

 diameter, at first 33-40^1, widens as it passes down, and the ectal portion of the duct is 

 bulbous, 56/M in diameter. The epithelial cells which line the lumen of the duct become 

 elongated and clearer in the bulbous portion, but are mostly still enclosed by the 

 muscular coat. A few cell aggregates burst through the muscular coat, and form rounded 

 lobes, of which one is seen in Fig. 2, and a number cut in section in Fig. 3. These 



