062 DESCRIPTION OF [Holatoria. 



STErHANOPs lamellaris {Brachionus lamellaris, M.) — Lorica"«'itli tkree 

 spines posteriorly. The rapid movement and transparency of this ani- 

 malcule renders its organization difficult to observe. Figs. 466, 467, 

 represent different views with the crystalline hood or diadem. 

 Found amongst Conferva. Length of loiica about 1 -300th. 



S. (?) muticus. — Lorica unarmed posteriorly, entire. Ehrcnberg 

 remarks it is active, and that he has not seen the eyes satisfac- 

 torily. Length 1-1 44th. 



S. cirratus {Brachionus cirratus, M.) — Lorica with two spines 

 posteriorly. This species has a contractile vesicle. Length 1 -240th. 



Genus Sqtjamella. TJie four-eyed EucManidota. — Eyes four, 

 fi-ontal ; foot furcate. The lorica is closed ftestulaj ; the rotaiy 

 organ consists of five or six muscular bulbs. In one species the 

 oesophageal head has jaws, with two or three teeth each ; its tube in 

 one is short, in the other long, and bent like the letter S. Both have 

 a two-partite intestine fgasterodelaj, with small glands, also an 

 ovarium and contractile vesicle. The eyes are disposed in pairs on 

 each eide the brow. 



S. hradea {BracMonus hractea, M.) — Lorica depressed, broadly 

 ovate. It is very transparent ; the toes thick and short, not evident. 

 Length of lorica 1- 144th. 



S. ohlonga. — Lorica depressed, either elliptical or ovato- oblong, 

 hyaline, toes long and slender ; eyes larger than in the foregoing 

 species. Figs. 468, 469, represent back and side views of this 

 animalcule. Found in green-coloured water, with Odamidomonas 

 puhisGulus. Length of lorica l-280th. 



Familt.— PHILODIN^ E A. 



This family comprehends Rotatoria devoid of lorica, but possessing 

 two simple rotatory organs, resembling wheels. The body of most 

 species is worm-like, or spindle-shaped (fusiform.) Portions of the 

 body can be thrust in and out, like the tubes of a telescope ; this is 

 effected by a sort of false joint, caused by a peculiar insertion of the 

 muscles. In all the species the foot is furcate ; and in Callidina, 

 Rotifer, Actinurus, and Philodina, it is provided with soft processes, 

 resembling, in shape, horns, near the false joints, as in the genus 



