408 DESCRIPTION OF [Rotatoria. 



Body white, provided with soft spines, eyes round. The 

 respiratory tube is thickened anteriorly in a globose man- 

 ner, the jaws have each three teeth. Figures 487, 488, 

 represent this animalcule, and Jig. 489, the jaws and teeth 

 separate. Length l-70th. 



705. Philodina megalotrocha. The great-wheel Philo' 

 dina is white, the body smooth and short, the wheels large, 

 the proboscis between them long, the eyes oval, and the 

 jaws two-toothed. Length l-216th to l-108th. 



