522 W. a. Goe^New Palceonemerteans. 



of the CESophagal region. The lacunae about the oesophagus are very- 

 large. The cephalic lacunae and nephridial system are briefly 

 described on p. 498. 



Brain well developed, the four lobes distinct. Lateral cords small, 

 closely pressed against the circular muscular layer. Side-organs 

 well developed, united with the posterior ends of the dorsal brain- 

 lobes. Their internal borders are separated from the lateral lacunae 

 only by a thin band of tissue. A ciliated canal of considerable size 

 leads directly outward to a minute, shallow pit on the side of the 

 head. The reproductive organs develop in sacs alternating with the 

 intestinal caeca. 



Sheffield Biological Laboratory of Tale University, June, 1895. 



