RELATIONS OF INSECTS TO OTHER ARTHROPOD A 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 myriopodous, 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 : me, eversible or coxal sac ; an, anus ; c, cercopod ; 

 1'. vestigial leg. After Haase. from Peytonreau. ARC. head and buccal appendages of Scolirpen- 

 drttla immaculata : A, head seen from above ; cl. clypeus. .B, head from beneath ; I, first pair of 

 legs; mx, 1st maxilla; my*, 2d maxilla; t, " labial plates " of Latzel, labium of Muhr. <\ 1st 

 maxilla ; I, lacinia ; g, galea ; p, rudiment of the palpus. After Latzel. /), end of the body : p n , 

 eleventh, p l2 , twelfth undeveloped pair of legs ; /> ]3 . modified, vestigial legs, bearing tactile organs 

 (*o) ; fig, cercopod, with duct of spinning gland, dg ; cd, eversible or coxal gland ; A*, coxal spur 

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



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



