560 



Transactions. — Geology. 



from an intermediate ancestor. The relative numbers of the 

 two species were as follow : At Glenmark M. casuarimis was 

 four times as numerous as M. didinus ; at Kapua it was four 

 and a half times as numerous; while at Enfield M. didinus 

 was nearly twice as numerous as M. casuarimis, so that M. 

 casuarimis decreased and M. didinus increased, relatively, be- 

 tween the dates of Glenmark and Enfield. 



This is only advanced as a suggestion for other collectors 

 to follow up. It may prove to be wrong, or it may lead to 

 observations which will establish the direction of development 

 of the moas. 



LEG BONES FROM GLENMARK. 

 Meionoenis. 



a, M. casuarinus. 



b. M. didinus. 



