no LIFE OF FLOWER 



of the teeth of marsupials, which appeared in the 

 Philosophical Transactions for 1 867 . In the following year 

 he delivered before the British Association at Norwich 

 a paper entitled " Remarks on the Homologies and Rela- 

 tion of the Teeth of the Mammalia," which was published 

 in the Journal of Anatomy and Physiology for the same 

 year. In that year he also published, in the Proceedings 

 of the Zoological Society, an account of the homology 

 and succession of the teeth in the armadillos. A general 

 sketch from his pen of the dentition of mammals 

 was published in the British Medical Journal for 1871, 

 while in the Transactions of the Odontological Society 

 for the same year, appeared a paper on the first, or milk, 

 dentition of the Mammalia. 



By far the most important of this series of papers is 

 undoubtedly the one on the succession and homologies 

 of the teeth in the marsupials or pouched mammals ; 

 and it is the one which contains, perhaps, the most note- 

 worthy discovery made by Flower. 



Owen had previously pointed out that marsupials 

 differ from ordinary placental mammals in having four 

 (in place of three) pairs of cheek-teeth at the hinder 

 part of the series which have no milk, or deciduous, 

 predecessors, and are therefore, according to the usual 

 rule, to be regarded as true molars, in contradiction to 

 premolars, in which such deciduous predecessors are 

 generally developed. He considered, however, that all 

 the premolars in the kangaroo (and therefore presumably 

 in other marsupials) as well as the incisors or cutting 

 teeth, and the canines or tusks, were preceded by milk- 

 teeth. Flower, on the other hand (who it is only just 

 to add had a much fuller series of specimens of young 



