162 



Sir Ray Lankester. 



suitable on account of the fact that they attained a fair size before any 

 sign of anthoeyan formation became observable. Buds of these were 

 gathered of the largest size attainable before any sign of anthoeyan 

 formation had appeared. The young petals were well ci'ushed in warm 

 alcohol {circa 95 per cent.), and, after standing for a short time, the extract 

 was filtered, and the filtrate acidified by the addition of a small amount of 

 concentrated hydrochloric acid. When the acid was added, the filtrate 

 changed slightly from pale yellow to colourless (on the other hand, ammonia 

 gave a deeper yellow), but in neither case was any red tint due to anthoeyan 

 observed. The acidified filtrate was divided into two portions ; to one a 

 little magnesium was added, the second was retained as a check. In the 

 case of both rose and viola, a gradual change to a clear pale red took place 

 in the colour of the liquid to which the magnesium had been added. The 

 portion of the acidified extract which had not had magnesium added to it 

 remained colourless. These observations leave no doubt that, in the cases 

 examined, there were flavonol derivatives present in the buds which would 

 later have developed anthoeyan colours, but in which up to that time no 

 anthoeyan had been formed? 



The authors intend to extend these observations. 



A Remarkable Flint Implement from Selsey Bill. 

 By Sir Eay Lankester, K.C.B., F.E.S. 



(Received January 18, 1921.) 

 [Plates 8-11.] 



It is desirable that the large rostrate flint implement drawn in figs. 1, 2, 

 and 3, and the hammer-stones drawn in figs. 4 and 5 should be made known 

 without further delay to students of prehistoric archaeology. These specimens 

 were placed at my disposal in 1912 by Mr. Edward Heron Allen, F.E.S., and 

 have now been presented to the Department of Ethnology and Mediaeval 

 Antiquities of the British Museum. They were briefly mentioned by me in 

 a postscript to my paper on " The Discovery of a novel type of Flint Imple- 

 ments below the base of the Red Crag of Suffolk."* 



These specimens, were (as I am informed by Mr. Heron Allen) found in 

 November, 1911, when the shingle was suddenly washed away below the 



* ' Phil. Trans.,' B, vol. 202 p. 332. 



