14 Mr. J. Starkie Gardner. Fossil Plants and the [Dec. 18, 



about the Medusae derived from Gymnoblastic or Calyptoblastic 

 hydroids. Direct development has been shown to occur in two or 

 three genera of the Trachylinaa (Geryonia, JEgineta, &c), whereas 

 regarding the life-cycle of the other forms we know nothing. 



The hydroid here described is now in an immature condition. It 

 may be a creeping stolon, which when further developed will resemble 

 other hydroids ; it may turn out not to be comparable to other 

 hydroids, and to be a fixed sporosac of some kind ; but if it grows into 

 an adult form resembling the form at present known, it may serve as 

 the type of a new group of hydroids related to the Tr achy line 

 Medusoids. 



December 18, 1884. 



THE TREASURER in the Chair. 



The Presents received were laid on the table, and thanks ordered for 

 them. 



It was announced that the question of the re-admission into the 

 Society of Mr. James Bateman would be put to the vote at the next 

 meeting. 



The Chairman gave notice that the President had appointed as 

 Vice-Presidents — 



The Treasurer. 

 Mr. Warren de la Rue- 

 Sir Frederick Evans. 

 Professor W. H. Flower. 

 Sir Joseph Hooker. 



Pursuant to notice, Mr. Alfred Cornu and Professor James D wight 

 Dana were balloted for and elected Foreign Members of the Society. 



The following Papers were read : — 



I. 44 On the Evidence of Fossil Plants regarding the Age of 

 the Tertiary Basalts of the North-East Atlantic." By 

 J. Starkie Gardner. Communicated by Sir J. D. Hooker, 

 K.C.S.L, F.R.S. Received November 27, 1884. 



In the following communication I desire to make known to the 

 Society some of the results which I obtained by means of grant given 

 to me by the Government Grant Committee. Brief and incomplete 



