198 ASPIDOSIPIION CYLINDRICUS. 



granular and lies with a less oblique angle to the trunk, 

 the proboscis is longer and its hooks have another shape; 

 internally it is distinct by its much broader nephridia and 

 by having the retractor-muscles attached on a greater 

 distance from the caudal extremity. 



Ley den Museum, October 1898. 



J^otes from thie Leyden IMuseum, \^ol. XX. 



