MYRIAPODS. 19 



CASE Spirostreptus javanicus (^;-.).— 28. Specimens (i); 29. Enlarged figure 

 .VJs of ditto. 



28, 29. 



A large exotic species from Java, placed here to shew the large 



size to which the species reach in tropical climates, and thereby 



to shew the characters of the Juli more distinctly. 



Nos. Spirostreptus annulatipes (yV^/..?).— 30. Specimens (2) ; 31. Enlarged 

 figure of ditto. 



30,31 



Spirostreptus annulatipes (natural size). 



This is probably a climatal variety of Newport's Spirostreptus 

 annulatipes. That species comes from West Africa, this from 

 Natal. The banded legs and other characters agree, but the fine 

 rugae on the segments spoken of by Newport are less numerous. 



Genus Polydesmus (Latr.). 

 This genus is the transition link between the Snake Millipeds 

 and the Centipeds. The species are flat and compressed, and 

 the segments are usually more or less granulated or nodose on the 

 back. The British species is small, but the exotic ones reach two 

 inches or more in length. Their exterior is very hard and im- 

 penetrable, but the joints and limbs are very fragile and easily 

 detached. They have the same mode of development as the Juli, 

 the early three pair of legs, however, appearing on the second, 

 fourth, and fifth segments, instead of on the second, third, and 

 fifth. They have also the same habits, and like them, have been 



