m PLANARIA. Class VI. 



GENUS X. PLANARIA. 



Body gelatinous, flattish. 

 Mouth terminal. 

 Pores two ventral. 



1. Lactea, Gm. Lin. 3O9O. . Kirhy In Lin. Tr. ii. 317. 



Hirudo alba. 



[Pl. of an ovate form when at rest, but linear 

 when in motion, and is then six or eight lines in 

 length ; color of a delicate white, through which 

 appear the elegant ramifications of the viscera. 



Found in slow^ streams among the Lemna 

 gibba. 



2. FuscA. Gm. Lin. 30Q0. Hirudo nigra. 



Pall. spic. Zool. X. 21. i. 1. Kirhy in Li?i. Tr. ii. 317. 

 /.13. 



[Pl. of a deep rich black color ; circular when 

 at rest, when in motion, linear, and increases 

 from one to three lines in length. 



Found on aquatic plants in slow streams. 

 Ed. 



