292 DESCRIPTION OF IPolyguslrica. 



The genera are disposed as folloAvs: 



tremulous 



brow 



continuous 



with the 



^ f with a pip long, proboscis-like. . Trachelius. 



E brow-like-^ 



"^ I upper lip Uip broad, hatchet-shaped Loxodes. 



mouth \ body I ° V.brow-like prominent back Bursaria. 



flap 



S 



Mouth spiral Spirostomum. 



Brow discontinued in a peg-like manner Phialina. 



[Mouth having a tremulous flap Glaucoma. 



J= c fA brow-like prominent upper lip Chilodon. 



H ^ l^A brow-like prominent back Nas'jula. 



Genus CX. Trachelius. The neck Animalcules are 

 characterized by having their bodies cihated, a simple 

 mouth destitute of teeth, and the upper hp very much 

 elongated in the form of a proboscis. This latter organ, 

 along with the cilii, serves for the purpose of locomotion; 

 in three species, however, no cilii are to be seen. The 

 mouth is seated at the base of the proboscis in four species. 

 In four species, also, the poly gastric structure of the ali- 

 mentary canal has been demonstrated by coloured food, and 

 in three the discharging orifice ; but, from the rounding off 

 of the extremities of the others, the latter has only been 

 presumed. In T. meleagris the gall is of a pale red colour. 

 The propagating apparatus of two species is hermaphro- 

 ditic; in the others it is only partially demonstrable. In 

 T. ovum, and T. meleagris the expulsion of ova granules has 

 been seen. Two species increase by transverse self- division. 



464. Trachelius anas (Trichoda anas et index, M.) 

 The goose-like Trachelius. — Body white, clavate, and cylin- 

 drical; proboscis thick, obtuse, and shorter than half the 

 body; mouth situated close to the base of the proboscis. 

 Fig. 287, 287*, exhibit two full-grown Infusoria; the for- 

 mer exhibits the curi'ents it produces to bring the food 



