1883.] Teeth of Sceparnodon Ramsay. 3 



Spores of iEcidium on Mahonia aquifolia germinating upon the cuticle of a wheat 

 plant : showing the germ-tubes entering the stomata. 



Experiment 162. — A wheat-plant, grown out of doors in the parish 

 of West Lynn, was placed in a flower-pot in April. On the 31st of 

 May this plant was removed to my garden, near King's Lynn, and 

 covered by a bell-glass. The plant was far more robust and consider- 

 ably larger than those employed in the former experiments. On the 

 2nd of June it was infected with fresh ascidiospores, sent by 

 Mr. Little from Stagsholt. The bell-glass was removed on the 5th, 

 and on the 10th of June the uredospores of Puccinia graminis made 

 their appearance. On the 19th there were thirteen stems of this 

 wheat-plant, about 18 inches in height ; fourteen leaves were affected 

 with uredo. There were many wheat-plants, of all ages, growing at 

 this time in the garden, but upon no one of them did any Uredo 

 linearis exist. 



II. "Description of Teeth of a large Extinct (Marsupial?) 

 Genus, Sceparnodon Ramsay." By Professor Owen, C.B., 

 F.R.S. Received October 2, 1883. 



(Abstract.) • 



In this paper the author describes teeth of a new genus of 

 Mammal, representing a species of the size of the Thylacoleo or 

 Nototherium, specimens of which teeth have been discovered in three 

 distinct and remote localities in Australia. In shape the teeth re- 

 semble the scalpriform incisors of the upper jaw of the Rodent ia ; in 

 the microscopic structure of the dentine there is a nearer resemblance 

 to that in the incisor of the large extinct form of wombat (Phasco- 

 lomus). Figures of the teeth, and of their dentinal structure mag- 



B 2 



