EXPLANATION OF PLATE XLVL 



Fig. l.—Adtliirqihiihi hn-nlor, stage III, much enlariit-.l. 

 Fig. 2.—Aih-li,r,i.lmhi himlor, stage IV, much enlai-.L-i-a. 

 Fig. ^.—AiM„r,j.h„ln hirohi; stage V (lai^t), enlarged. 

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