Henry Woodioard — On British Fossil Artkropoda. 107 



accounts, more probable than tbe alternative one wbich. he has 

 adopted, namely, that of supposing it to be the posterior angle of 

 the head-shield of -E'Mr?/jjie?-t(s, with which indeed it seems exceedingly 

 difiS,cult, if not impossible, to associate it. 



Fig. 9, A arid B. — ArthrojyJcura ffraw^rt, Jordan. Coal-measures, Saarbruck, Rhenish 

 .Prussia. Copied from Palaeontographica, 1856, band iv., taf. 2, figs. 4 and 5. 



