THE 
WHITE PLANARIA. 
Generic Character. 
Body gelatinous, flattifh, with two ventral pores. 
Mouth terminal ? 
Specific Character. 
Oblong, white, depreffed PLANARIA, truncated 
in front. 
Milk-white PLANARIA, Purple-veined PLA¬ 
NARIA, &c. 
The genus Planaria, firft inftituted by the accu¬ 
rate Muller, is nearly allied to that of Hirudo, and, 
in reality, feems to form a link between that and the 
marine genus Doris. The Planariae are natives of 
frefh waters, and many fpecies may be found in ri¬ 
vers and ftagnant waters : their general motion is 
fmooth, flowifh, and even; accompanied with va¬ 
rious occafional flexures, and with all the degrees of 
contraction and extenfion which are exhibited in 
the genus Hirudo. They are generally feen moving 
over the furface of aquatic plants, and fometimes 
immediately below the furface of the water itfelf, 
fwimming in an inverted polition. The fpecies here 
repre- 
