338 ANALYTICAL INDEX. 



CHAPTER III. continued. 



2. All the preceding Planarise inhabit the sea, . PAGE 107 



Others dwell in lakes, ponds, and marshes, . . . ib. 



a. PLANARIA HEBES The Sluggish Planaria, . . ib. 



Length, breadth, colour, &c. described, . . . ib. 



Plate XVI. explained, .... ib. 



b. PLANARIA LACTEA The Milky Planaria, . . ib. 



Type of the genus Planaria usually selected by Naturalists, ib. 



Found in Philipston Loch, and in a pond at Red Braes, . 108 



Animal described, ..... ib. 



When replete with food the interanea is displayed, . ib. 



Propagation Dr Johnson, .... ib. 



Feed alike on animal and vegetable matter, . . 109 



Lives in society, among decaying leaves, . . ib. 



Of nocturnal habits, ..... ib. 



Plates XIV. and XV. explained, ... ib. 



Note. The genus Planaria M. Duges and Mr Darwin, 110 



c. PLANARIA FODIN.S: The Quarry Planaria, . . ib. 



Size, appearance, and organs described, . . ib. 



Propagation, ..... ib. 



History of specimens, ..... ib. 



Lurks among mud animal rare, . . . Ill 



Plate XV. explained, ..... ib. 



d. PLANARIA ARETHUSA The Fountain Planaria, . ib. 



Slight and indefinite distinctions perplexing, . . ib. 



This species not to be identified with the Planaria torva, 112 

 Description of specimens collected at the Dropping Well, Foul- 

 den, Berwickshire, ..... ib. 

 Feed on animal substances, the snow-white pupa their favourite, ib. 

 Colour, size, and aspect depend upon quantity and quality of 



the food, ..... ib. 



Protected from abrasion by a glutinous secretion, . 113 



Propagation obscure M. Duges, ... ib. 



Vigorous reproductive faculty Dr Johnson, . . 114 



Dwell in springs or fresh-water rills, . . ib. 



Plate XVI. explained, . . . . .115 



/. PLANARIA VAEIEGATA, .... ib. 



Observations on a single specimen, . . . ib. 



Length, breadth, &c., ... ib. 



