314 DESCRIPTION OF [Poli/gastrica. 



524. Amphileptus longicollis {Kolpoda ochrea, Trichoda 

 fe/is, M.) The long-necked Amphileptus. — Body dilated, 

 and turgid posteriorly, attenuated and elongated anteriorly, 

 like a sword. Found amongst lemna. Size 1 -120th 

 to 1 -96th. 



525. Amphileptus (?) popillosus. The fringed Amphi- 

 leptus. — Body depressed, lanceolate, fringed with papillae, 

 tail and proboscis smooth. Found amongst conferva. 

 Size 1 -600th to l-430th. 



Genus CXXIII. Uroleptus. The train Animalcules 

 have neither eye, tongue-like process, nor proboscis, but are 

 provided with a tail. Locomotion is effected by cihi ; in 

 three species these are disposed in rows. The polygastric 

 apparatus has been demonstrated by coloured food in two 

 species, the mouth observed in all of them, but the dis- 

 charging orifice has not been satisfactorily determined. 

 Green coloured ova granules are evident in two species, 

 but no male organs. 



526. Uroleptus piscis {Trichoda piscis, M.) The 

 little fish Uroleptus. — Body like an elongated top, the 

 posterior part gradually attenuated, forming a thick tail ; 

 ova greenish. The body is covered with cilii, those at the 

 mouth being largest. Found, in February and March, 

 amongst the floccose brown coat upon dead sedge leaves, 

 along with Chlamidomonas and Cryptomonas. (Hamp- 

 stead ponds.) Size l-288th to l-44th. 



527. Uroleptus musculus {Trichoda musculus, M.) 

 The water-mouse Uroleptus. — Body white, cylindrical, 

 pear-shaped, incrassated towards the posterior, where it 

 abruptly terminates in a tail, as seen in the engraving, 



figure 333, plate vii. The movement is rolling, it is in- 



