MTRIOPODS. 



357 



1. Spiros- 

 trephon copei of 

 Mammoth Cave. 



Fig. 305. Larva of 

 Jnlus. a, third ab- 

 dominal segment, with 

 the new limbs just 

 budding out; 6, new 

 segments arising be- 

 tween the penultimate 

 and the last segment. 

 After Newport. 



Polydes- 

 vnus ery- 

 thropygus 

 common 

 Polydes- 

 xnus. 



Fig. 307 .Polydesmua cavicola, from Utah, 

 top and side view, a, antenna ; ft, a segment 

 and leg: c, dorsal view of two segments show- 

 ing ornamentation : d, side view of two terminal 

 segments of the body all magnified. 



Natural size. 



