588 DESCRIPTION OF Poli/gastrica. 



The Aynphilepti are commonly found in the limpid water of 

 marshes or brooks, among aquatic plants. 



Amphileptus anser (Vibrio anser et cygnus, M. dileptus, D.) — 

 Body turgid, spindle-shaped ; proboscis obtuse, same length as 

 body ; tail short and acute. The neck-like proboscis is truly a 

 brow or upper lip, the mouth being at the base. Ehrenberg thinks 

 he has seen the anal opening upon the dorsal surface, near the 

 tail. The motion of the body is slow, but that of the proboscis 

 more active. Figs. 312, 313, represent two views of this creature. 

 Found amongst dead sedge leaves, &c. Size 1-1 20th. 



A. margaritifer. — Body white, slender, spindle-shaped; proboscis 

 acute equals the length of the body ; tail short. The most striking 

 features are the swollen margin of the mouth, and necklace-like 

 scries of vesicles disposed along the body. It feeds upon green 

 Monads, like the preceding species. Cilia are absent in Ehrenberg's 

 figures. Found amongst colonies of Vorticella, &c. Size l-72nd. 



A. moniliger. — Body tui'gid, ample, white ; proboscis and tail 

 short; it has a necklace-like gland. Found amongst duck-weed. 

 Size l-96th to l-72nd. 



A. viridis. — Body turgid, spindle shaped, and of a green colour; 

 proboscis and tail short and transparent. Found amongst Lemna 

 minor. Size 1-1 20th to l-96th. 



A. fasciola {Vibrio anas fasciola et intermedins. Paramecium 

 fasciola, M.) — Body white, depressed, linear, lanceolate, convex 

 above, flat beneath. When viewed from above, from ten to twelve 

 longitudinal series of delicate cilia may be seen, and in the middle 

 of the body two round glands, posterior to which is a sexual vesicle, 

 and ova granules between the digestive cells. Figs. 314, 315, 

 316 represent three views of this creature. Found in infusions. 

 Size l-720th to l-144th. 



A. melengris (Kolpoda, M., LoxophyUum melagris, D.) — Body 

 large, compressed, membranous, broadly lanceolate in shape, with 

 the crest of the back denticulated. The colour of this interesting 

 animalcule is white. On the under side there is a more or less 

 distinct row of eight to ten bright colourless spots (juice-bladders). 

 Found with Lemna. Size I -72nd. 



A. fongicoUis {KoJpoda ochrea, Trichoda felis, M.) — Body dilated ; 



