Euchlanidota.] THE INFUSORIA. 393 



Figures 466,467, represent different views of this creature, 

 with its crystalline hood or diadem. Found amongst con- 

 ferva. Length of lorica about 1 -300th. 



684. STEPHANOPS (?) muticus. The (hornless Stepha- 

 nops. Lorica unarmed posteriorly, entire. Ehrenberg 

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

 satisfactorily. Length 1-1 44th. 



685. STEPHANOPS cirratus (Brachionus cirratus, M.) 

 The two-pointed Stephanops. Lorica with two spines pos- 

 teriorly. This species has a contractile vesicle. Length 

 1 -240th. 



Genus CLXXVII. SQUAMELLA. The four -eyed Eu- 

 chlanidota have four frontal eyes, and a furcated foot. The 

 lorica is closed (testula), and the rotatory organ consists of 

 five or six muscular bulbs. In one species the cesophagal 

 head has jaws, with two or three teeth each. The oesopha- 

 gal tube in one is short, in the other long, and bent like the 

 letter S. Both have a two-partite intestine (gasterodela), 

 with small glands, also an ovarium and contractile vesicle. 

 The eyes are disposed in pairs on each side the brow. 



686. SQUAMELLA bractea (Brachionus bractea,M.) The 

 crystal Squamella. Lorica depressed, broadly ovate. It is 

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

 Length of lorica 1-1 44th. 



687. SQUAMELLA oblonga. The elongated Squamella 

 has a depressed lorica, either elliptical or ovato- oblong, 

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

 the foregoing species. Figures 468, 469, represent back 

 and side views of this animalcule. Found in green-coloured 

 water, with Chlamidomonas pulvisculus. Length of lorica 

 1 -280th. 



