No. 486] 



PODOCARPINE.E 



357 



In Podocarpus however tliere is no atrophv of the protliallial 

 riidnnents at this stage, but tliev undergo further chanoes of a sur- 

 prising character, comparable onlv to those recently described bv 

 Thomson^ in the genus Araucaria. In h figure 2, a later stage of 

 development is shown, in which each of the prothallial cells has 

 undergone transverse or anticlinal division. Division generally 

 takes place first m the outu piothalhal cell hing next the ^^all 



of the microspore and subsequently in the second prothallial 

 cell. Contrary to the statements of Coker' in regard to P. conacm, 

 where a similar but less well marked condition has been descril)ed 

 as a probable abnormality due to artificial conditions, anticlinal 

 divisions of the prothallial cells are not initiated l)v direct divi- 

 sion of the nucleus but by true mitosis. In tlu' (vlls <lfn\c.l tiom 



