DOXOCO'CCUS. 85 



occasionally, and possess a single red eye, and a 

 double hair-like proboscis. G. tingens is oblong, 

 of a beautiful green colour, and the proboscis is 

 only half the length of its body. Doxococcus niber 

 (Drop II. fig. 2) is a pretty lively little animal- 

 cule, having a peculiar rolling motion ; of globu- 

 lar form, and possessing neither tail nor eye; 

 the colour is a brownish-red; D.pulmsculus is 

 green ; and D. inequalis, irregularly round, trans- 

 parent, and covered with green spots. These 

 interesting little creatures will be readily distin- 

 guished by their globular, form, bright colours, 

 and singular motion, and add greatly to the 

 beauty of the animated scene, which they often 

 diversify. Occasionally they are found in consi- 

 derable numbers, and then they appear to keep 



