1904.] 



XATURAI SCIENCES OF PHILADELPHIA. 



209 



Fij^. A. Outline sketch of a large mature specimen of Planaria simplissima, 

 a^gray sensory area on the lateral auricular appendage. 7J=:pharynx. 

 (7=genital opening. 



Fig. B. Outline drawing from Curtis's sketch of a. small specimen from Wil- 

 liams town. 



and, I think, leaves no doubt that we have the same species, which 

 may be described as follows: 



Planaria simplissima Curtis. 



Length of mature specimens 7-15 mm.; breadth 2-4 mm. Color 

 a nearly uniform seal-brown'(occasionally grajdsh) with an inconspicu- 

 ous gray area on each'cephalic appendage. Eyes gray with a crescent 

 of black pigment on the median side. Both anterior and posterior 

 ends blunt. Lateral^cephalic appendages blimt and inconspicuous as 

 compared with P. macvlata. Body thick as compared with P. macu- 

 lata. Pharynx just posterior to the middle point of the longitudinal 

 axis of the worm. Ovaries two, ventral, somewhat lobed, and situated 

 about half-way from the anterior end of the animal to tlic pharynx. 

 14 



