with an Account of their Habits, 245 



sides with several very fine parallel lines of the same tint ; foot white, 

 exteriorly clouded, together with the margin of the body, with pale 

 blackish purple : body crossed by three colourless rings, in the two 

 posterior of which the orifices are situated. Length 1 inch ; breadth 

 more uniform, and greater in proportion to length of body, than in 

 the last species. 



Hab. Same as in P. vaginuloides. 



3. Planaria pulla. 



Mouth-sucker, when protruded and contracted in spirits of wine, 

 globular. Ocelli numerous, placed at regular intervals on the ante- 

 rior part of the body. Body slightly flattened, gradually increasing 

 in width from the anterior extremity, which is much pointed and 

 grooved beneath. Back rich " umber-brown," with a central narrow 

 streak of " broccoli-brown " reaching entire length : foot broccoli- 

 brown, with two clear spaces for the orifices. Length when fully 

 extended l^ths of an inch ; breadth ^th of an inch. 



Hab. Very frequent under stones : Monte Video and Maldonado 

 (June and August). 



4. Planaria bilinearis. 



Ocelli numerous, placed at regular intervals. Body subcylindrical, 

 narrow, of nearly uniform breadth. Colour above pale dirty yellow 

 with two stripes of .** umber-brown," which become narrower and 

 unite at the two extremities. Length when fully extended lf^yths ; 

 breadth yJo^ ns °^ an i ncn ' 



Hab. Same as P. pulla (June and August), 



5. Planaria nigro-fusca. 



Alimentary orifice situated at rather less than two-thirds of the 

 entire length from the anterior extremity : genital orifice, with the 

 body contracted, is situated at the j 2 /(jths of an inch posteriorly. 

 Ocelli very numerous ; those on the extreme tip very minute and 

 placed at regular intervals ; those on the margin of the body grouped 

 by two and three together. Body much depressed, tapering suddenly 

 towards the anterior extremity ; tail abruptly terminated in a point. 

 Above uniform blackish brown, beneath pale. Length when fully 

 extended 2 inches ; breadth ^jths of an inch. 



Hab. Under rotten wood : Maldonado (May). 



6. Planaria pallida. 



The alimentary and genital orifices xo tns of an inch apart, when the 

 body is partially contracted : mouth-sucker when dissected out of the 

 body T \$jths of an inch in length; its margin very sinuous. Ocelli 

 numerous ; eleven close together, being placed on the anterior extre- 

 mity ; and the others in groups of two and three on the sides, and 

 chiefly on the anterior half of the body. Body much depressed and 

 flat, with both extremities finely pointed. Upper and lower surfaces 

 white, with the pinkish intestinal vessel seen through. Length when 

 crawling 3 inches ; breadth T %ths of an inch. 



Hab. Under stones on the dry hills near Valparaiso (July). 



