63 



mated with a typical male, four classes appear amoiij^ tlie gametcj- 

 phytic offspring; tufted females, typical females, tufted males, 

 and typical males. Apparently the tufled offspring are more 

 numerous than the ty|)ical offspring. 



The "polycladous" character, first found in a male race, is 

 marked by a profuse and irregular branching, the reduction or 

 absence of involucres, and the presence of few antherids. The 

 mating of a polycladous male with a typical female results in 

 four approximately equal classes of gametophytic offspring. 

 The polycladous females have thus far proved entirely sterile. 



The sporophytes borne by the female plants of one clone pro- 

 duce spores that are separate at maturity instead of adherent in 

 tetrads. The spore-separation character is inherited only 

 through the female offspring of this clone, the transmission of 

 this character following, therefore, the same course as that of the 

 X-chromosome. 



A semi-stqrile male race has been isolated, resembling typical 

 races except in the small proportion of antherids and involucres 

 produced. Races of both sexes have also been found which 

 differ in the proportion of appendages borne upon their involucres. 

 The inheritance of these latter characters has not yet been 

 studied. 



Arthur H. Graves, 



Secretary. 



Meeting of March ii, 1924 



This meeting was held at the Museum of Natural History. 

 Professor Jean Massart of the University of Brussels gave an 

 interesting address, illustrated with lantern slides, on the 

 " Intei'nal Sensations of the Norfolk Island Pine {Araucaria 

 excelsa)." Professor Massart pointed out that as regards the 

 position and potentialities there are 6 kinds of buds on the stems 

 of Araucaria excelsa: the active terminal bud of the main stem; 

 the dormant lateral buds of the main stem; the active terminal 

 bud of the primary branch; the dormant lateral buds of the 

 primary branch; the active terminal bud of the secondary 

 branch, and the dormant lateral buds of the secondary branch. 



That there is an internal correlation of some sort existing 

 between these different classes of buds is shown by experi- 



