RELATIONS OF INSECTS TO OTHER ARTHROPODA 19 



poda, and shows the intimate relation of the 

 myriopods and the hexapods, perhaps not suffi- 

 ciently appreciated by many zoologists." 



In 1880 Ryder regarded it as " the last survival 

 of the form from which insects may be supposed to 

 have descended," and referred it to "the new ordi- 

 nal group Symphyla, in reference to the singular 

 combination of rnyriopodous, insectean, and thy- 

 sanurous characters which it 

 presents. 1 " 



Wood-Mason considered it 

 to be a myriopod, and "the 



FIG. 14. Scolopendrella immaculata, from above, after Lang; also from beneath, the 

 genital opening on the 4th trunk-segment : sac, eversihle or coxal sac: an, anus; c, eercopod ; 

 r. vestigial leer. After TTaase. from Peytoureau. ABC, head and hueeal appendages of Scolopen- 

 drelJa immaculafa : A, head seen from above : c/. clypeus. B, head from beneath : ?, first pair of 

 Ifsrs : my, 1st maxilla; m.r 1 , 2d maxilla: t. "labial plates" of Latzel, labium of Muhr. C, 1st 

 maxilla; f, laoinia : cj, galea ; />, rudiment of the palpus. After Latzel. D, end of the body: p n , 

 eleventh, /> 12 . twelfth undeveloped pair of le<rs ; p n . modified, vestigial legs, hearing tactile organs 

 (sol ; g(j, eercopod. with duct of spinning gland, dg ; cd, eversible or coxal gland ; hs, coxal spur 

 of the llth pair of legs. After Latzel from Lang. 



1 American Naturalist, May, 1880, pp. 375, 376. 



