146 



BRISTLE-TAILS AND SPRING-TAILS. 



common white Lipura is the European L. fimetaria Linn. (Fig. 

 173, copied from Lubbock). The site of the spring is indicated 

 by an oval scar. 



Figure 174 represents Anurida maritima found under stones 

 between tide marks at Nantucket. It is regarded the same as 

 the European species by Lubbock, to whom I had sent specimens 

 for comparison. This genus differs in the form of the head 



175. 



Amirida.maritima. 



from Lipura and also wants the terminal upcurved spines, while 

 the antennas are much more pointed. The legs (Fig. 175) 

 end in a large, long, curved claw. On examining specimens 

 soaked in potash, I have found that the mouth-parts of this 

 species (Fig. 176, md, mandibles; mx, maxillae; e, eyes, and a 

 singular accessory group of small cells, are like those of Acho- 

 rutes, as previously noticed by Laboulbene. The mandibles, 

 like those of other Poduras, end in from three to six teeth, and 



