G8 PLANARIA. Class VI. 



GENUS X. PLANARIA. 



Body gelatinous, flattish. 

 Mouth terminal. 

 Pores two ventral. 



1. Lactea. Gm. Lin. 30g0. Kirby 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. Fcsca. Gm. Lin. 3090. Hirudo nigra. 



Pall. spic. Zool. x. 21. I. 1. Kirly in Lin. 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. 



