Trachelaia.'] THE INFUSORIA. 295 



harp-shaped Loxodes. — Body triangular and compressed, 

 anteriorly it is dilated and obliquely truncated, but pointed 

 at the posterior extremity. Colour white. Size l-430th 

 to 1-2 10th. 



474. Loxodes hursaria. The green Loxodes, — Body 

 oblong, anteriorly it is obliquely ti'uncated and depressed, 

 posteriorly hemispherical. Found in bogs. Size 1 -280th. 



475. Loxodes plicatns. The wrinkled Loxodes. — This 

 small creature has an elliptical depressed body, convex on 

 the back, and slightly plicated ; the lip is uncinate. Found 

 on conferva. Size l-430th. 



Genus CXII. Bursa ri a. The purse Animalcules. — 

 This interesting genus is composed of creatures covered 

 with cilii, the anterior part convex, their mouth not ter- 

 minal, though simple, toothless, and devoid of tremulous 

 flap. The cilii serve as organs of locomotion, and are dis- 

 tinctly seen in coloured water ; they are generally disposed 

 in roAvs, those around the mouth are longer than the others. 

 The nutritive system consists of an alimentary canal, curved 

 forwards ; it is furnished with digestive cells resembUng 

 little purses, which are attached to it by short stalks. The 

 mouth is large, not situated, as in Leucophiys, obliquely at 

 the anterior extremity of the body, but laterally, so that, 

 as it w^ere, a brow either projects over it or else forms the 

 end. The bile is white or reddish, the propagative appa- 

 ratus hermaphrodite in three species, and in five but partly 

 known. Self-division, longitudinal or transverse, has been 

 observed in five species. 



{a.) Sub-ge7ius Bursaria. — The inferior {not anterior) lip 

 reaching to the frontal margin. 



476. Bursaria trnncatella (M.) The truncated Bur- 



