April 1891.] BOTANICAL SOCIETY OF EDINBURGH. 89 



MEETING OF THE SOCIETY, 



Thursday, April 9, 1891. 



Egbert Lindsay, President, in the Chair. 



William Maxwell Tress was admitted Kesident Fellow 

 of the Society. 



Presents to the Library, Herbarium, and Museum at the 

 Eoyal Botanic Garden were announced. 



Dr Hugh F. C. Cleghorn exhibited a series of photographs 

 illustrating the method of gathering the fruit of the Date 

 Palm at Port Said, and referred to the character of the species 

 and varieties of Phcenix, and to their distribution and their 

 uses. 



The Curator exhibited Saxifraga retusa, S. oppositifolia, 

 var., Corhularia tcmiifolia, Soldanclla Clusii, Epigcca repens, 

 Bhododcndron ciliatmn x B. Edgcworthii, Phyllodadus rliom- 

 hoidcdis ^, and Phyllodadus trichomanoidcs ^, in flower, 

 from the Eoyal Botanic Garden. 



Mr Paxton exhibited flowers of both sexes of Viscum 

 album. 



The following Papers were read : — 



Development of the Macrosporangium of Myosurus 

 minimus, Linn. Part II. '^ By Gustav Mann. 



The cell giving rise to the embryo-sac increases in size, and 

 a vacuole makes its appearance at the anterior end close to 

 the nucleus ; the vacuole increases in dimension, and thus 

 helps to bring about the rapid growth of the future embryo-sac. 

 The primary nucleus divides, and now the vacuole lies in the 

 centre of the cell ; ultimately eight nuclei are formed, three 

 of which at either end acquire cell-walls, while two nuclei 



* For Part I. see page 67. 

 TRANS. BOT. SCO. VOL. XIX. G- 



Issued June 1891. 



