SOME AQUATIC WORMS, E'JC. I97 



white body giving the creature a father pleasingap- 

 pearance. They are not for ornament, however, but 

 are the branches of the stomach indistinctly seen 

 through the walls of the body. The niouth is near 

 the center of the lower surface. The worm may 

 measure half an inch in length. It has been named- 

 Drendocceluin I act mm. 



The entire surface of both these common Turbellar- 

 ians is finely and closely ciliated. The color of the 

 body will at once inform the observer which one he 

 has captured, as they are not microscopic in size. 



V. ANGUILLULA (Fig. 146). 



The body is thread-like, perfectly transparent and' 

 colorless, about fifteen times as long as broad, rather 

 widest in the middle, whence it slightly tapers towards 

 both - ends. The frontal border is 

 rounded, but with a low power appears 

 as if truncated. The round mouth 

 is at the center of this end, and leads 

 into an oblong pharynx or throat. 



The tail is usually long and 

 sharply pointed. The worm's move- 

 ments are generally slow and deliber- 

 ate, but occasionally it has a lively 

 spell, thrashing about greatly to the 

 detriment of other . objects on the pig. 146.— Anguiiiuia. 

 slide, and often becoming a nuisance. 



It is reproduced by eggs, one or more often being 

 visible within the transparent body. Anguillulse are 

 common in wet moss, among the leaflets of aquatic 

 plants, and in the ooze of the ponds. 



The well-known "vinegar-eel" is an Anguiiiuia {An- 



