75 



March 30, 1904 



The Tone)' Botanical Club met in the morphological labora- 

 tory at the New York Botanical Garden with about 20 persons 

 present. Dr. 1). T. MacDougal called the meeting to order; Dr. 

 C. C. Curti.s was elected chairman and Mr. W. T. Home 

 secretar}-. 



The first paper on the scientific program was " Notes on the 

 C\lology of the Aquatic Fungi " by Dr. Cyrus A. King. 

 Schroeter's classification of the Phycomycetes was reviewed and 

 attention called to the fact that the conidia of the Peronosporineae 

 resemble sporangia since they germinate by forming internal 

 zoospores. In the Saprolegniaceae, according to Trow, the eggs 

 are at first multinucleate, all except the sexual nucleus in each 

 egg being disposed of by digestion. Dr. King's researches have 

 shown that in the Leptomitaceae, as far as known, the oogonia 

 are at first multinucleate and the supernumerary nuclei are dis- 

 posed of by migrating to the periphery of the cell where the}' 

 are cut off in a distinct periplasm. In Araiospora the peripheral 

 nuclei surround themselves with cell walls in such a way that 

 the ooplasm is surrounded by a la\er of periplasmic cells. In 

 Sapromyccs there is also a periplasm in which the nonsexual 

 nuclei are cut off; it is however reduced to a ver)' thin layer. 

 The formation of a body in the center of the egg of Araiospora 

 by the coalescence of several small cytoplasmic patches from 

 various parts of the ooplasm was described. The body probabh- 

 is an attraction center for the sexual nuclei. A similar structure 

 was not found in Sapromyccs. Rhipidiiini was also briefl\- 

 described. The presence of a periplasm and the migration of 

 the nuclei from the developing egg indicates that the Leptomi- 

 taceae are more closely allied to the Peronosporineae than to the 

 Saprolegnineae. Photomicrographs were shown from Dr. King's 

 preparations showing the facts brought out and showing also 

 indirect nuclear division in the oogonium and ^oosporangium of 

 Sapromyccs. 



An interesting discussion followed. 



The second paper was by Mr. B. C. Gruenberg and was en- 

 titled " Chemical Investigations on Hacmafo.vylon." Haema- 



