48 



Delegate to Council of Representative on Board 



N. Y. A cademy of of Managers, N. Y. 



Sciences Botanical Garden 



W. J. Robbins T. E. Hazen 



(Vote for Four) 



Members of the Council 



Airs. G. P. Anderson John M. Arthur 



F. E. Denny Alfred A. Gunderson 



H. H. Clum E. B. Matzke 

 W. J. Robbins 



(Vote for Two) 



Representatives on the Council of the A. A. A. S. 

 John H. Barnhart William Crocker 



The scientific part of the program consisted of reports by Mr. 

 D. A. McLarty and Mr. Arthur B. Hillegas of the Botany De- 

 partment of Columbia University. 



Mr. McLarty reported on "The Identity and Relationship 

 of Certain Species of Pseudolpidium." 



"In 1892 Fischer reinstated Cornu's genus Olpidiopsis to its 

 original status and established the genus Pseudolpidium to in- 

 clude small, Olpidiopsis-like, chytridiaceous parasites of vari- 

 ous water molds which exhibit no adjacent cell in relation to 

 their resting spores. Fischer described the zoosporangia of P. 

 saprolegmae as being thin-walled and spherical or oval in shape 

 in contrast to long-ellipsoidal or cylindrical zoosporangia as in 

 the case of P. fusifor7ne. In each case he described a heavy- 

 walled, spiny resting spore similar to the zoosporangium with 

 which it was associated. 



"In swollen fHaments oi A chlya obtained in November, 1937, 

 zoosporangia of P. fusiforme were observed and a study of the 

 life cycle and cytology of the species was begun. However, it 

 was soon noted that dependent upon the conditions of growth 

 it was possible to obtain in one culture all the types of sporangia 

 mentioned above. The spiny sporangia proved to be thin-walled 

 and germinated directly. Thick-walled, spherical, spiny spo- 

 rangia similar to those described by Butler for certain species of 

 Pseudolpidium were observed from time to time. To determine 



