lUtlchlanidofa.] INFUSORUI ANIMALCULES. 655 



loricu plicated on each side ^^•itl^ a deep fuiTow ; the occipital and 

 mental deeply incised. Colour j-ellowish-brown. Length of lorica 

 1-1 75th. 



(ieuus Mastigocekca. 17is whip-tailed Rotatory Animalcule. — Ej^e 

 single, cervical ; foot simple, styliform ; lorica prismatic and crested 

 on the back. It has a four-partite rotatory organ, a small muscle to 

 move the foot, an oblique oesophageal head, with une(iual jaws, 

 two-toothed ; a short oesophagus, simple intestine, with two 

 spherical glands, a globular ovarium, a contractile vesicle, and a 

 long ganglion. 



M. carinata {Trichodus rattm, M.) — Lorica anterioi'ly crested on 

 the back ; foot the same length as body ; it swims slowly, and resem- 

 bles Monocerca rattm. Figs, 438, 439, are side views, showing the 

 delicate ridge of the lorica projecting on the back, and fig. 440 a 

 dorsal view. Found amongst Ceratophyllum. Length l-72nd. 



Genus Eccklaxis. ITie mantle Rotatoria. — Eye single, cervical ; 

 foot furcate ; lorica oval and flexible, longitudinally gaping upon the 

 ventral surface. Compound vibratHe muscles, with their cilia, com- 

 pose the rotatory organ : the other muscles are those for moving the 

 foot, and for manducation, and fibrous longitudinal ones, presenting 

 transverse corrugations. An oesophageal head, with one or many- 

 toothed jaws (perhaps four jaws in E. macrurd), {gyranogomphia), a 

 very short oesophagus, an alimentary canal (simple in five species, 

 constricted in one), having two glands, compose the nutritive appa- 

 ratus. An ovarium is observed in five ; and two small glands, with 

 a contractile vesicle, in two of the larger species. Two species have 

 perhaps transverse vessels, and in the larger forms tremulous gills 

 are observed, attached to the sexual glands ; a respiratory tube is 

 seen in E. lynceus only. All the species have a red-coloured cervical 

 eye, which, in five species, is connected -with a large ganglion. They 

 do not carry about their eggs externally, nor are they developed in 

 large numbers. Dujardin does not admit the genus ITotiostylus, but 

 places its tliree species in the present one — Euchlanis. 



E. (?) triqmtra. — Lorica very large, trilateral, with a dorsal crest ; 

 seta) on foot none. This species is very diaphanous, and " therefore," 

 I'emarks Ehrenbcrg, " I Avas never able to see the line of division on 

 the ventral surface of the lorica ; the relationship of the fibres of 



