570 DEsciiirTiON OF [Polygastrica. 



middle of the body, aud not at the base of tlic proboscis. Found 

 amongst Conferva. Size l-120th. 



Tkacheijtjs meleagris. — Body compressed, lanceolate, often curved 

 in the form of the letter S ; proboscis thick obtuse, shorter than 

 half the body ; it has along the back a series of vesicles, like a 

 string of pearls. Size l-96th to l-72ud. 



T. lamella {Kolpoda lamella, M.) — Body depressed laminated, 

 linear-lanceolate, often truncated anteriorly, and rounded, with the 

 margin ciliated. Size l-900th to l-280th. In sea-water (f. 24 a.b., 

 Plate 21. 



T. anaticula. — Body white, small, ovate, pyriform, attenuated and 

 diaphanous anteriorly. Dujardin believes he has seen several of 

 these animalcules simply agglutinated together, which if so, would 

 indicate the absence of a true integument. Found amongst Conferva. 

 Size l-570th to l-280th. 



T. (?) tricophorus ( Vibrio strictus, M.). — Body cylindrical change- 

 able, often clavate ; proboscis capitate, of the form of a very delicate 

 whip. Size 1-1 200th to 1 -430th. 



T. (?) globulifer. — Body spherical, hyaline, with a very delicate 

 whip-like acute proboscis. Found amongst Conferva. Size 1 -200th. 



T. ovum. (Fig. 290). — Body ample, ovate, broadly open, or campanu- 

 late anteriorly ; proboscis short, in the form of a beak ; colour' white. 

 In no infusorial animalcule is the alimentary canal so easily seen as 

 in this ; the large mouth and contractile vesicle lying over the lower 

 part of the alimentary canal, are equally evident ; numerous small 

 digestive cells and ova-granules appear in every part. Found in 

 stagnant bog- water. Size l-72nd. 



T. (?) laticeps. — Body flattened, elliptical; anterior part (head) 

 membranous, variable and wide, with a notch from which a flagelli- 

 form proboscis proceeds double almost, in length that of the body. 

 Size 1-9 12th. In North Sea. 



,Y,*-;^ Although the names of some of the species of Trachelius 

 described by Dujardin, differ from those given by Ehrenberg, yet 

 the definitions indicate no new species. 



Genus LoxoDES. — The lipped Animalcules. — Bodies covered with 

 cilia, mouth simple, devoid of teeth ; upper lip continuous and broad, 

 hatchet-shaped ; the organs of locomotion are the rows of cilia on 



