118 



SCIENCE. 



[N. S. Vol. VII. No. 161. 



2. Studies on some Mycelium, and Fungi from a 

 Goal Mine (illustrated by lantern views) . 

 Pbofessor G. F. Atkinson, Cornell Uni- 

 versity. 



The author described and illustrated by 

 lantern views the remarkable developments 

 of mycelia on the wooden beams, etc., of an 

 abandoned part of a coal mine near Wilkes- 

 barre, Pa. He photographed these by flash- 

 light, and found fruiting specimens by which 

 several of the species were determined. 



3. Js there Basidimnycetous Stage in the JJife- 

 History oj some Ascomycetes f Dr. E. A. 

 BuET, Middlebury College. 



The author has been unable, by the study 

 of collections made in August, October, 

 N'ovember, December, to confirm Massee's 

 observations on the basidiomycetous nature 

 of Da&ryopsi^ Ellisiana and, therefore, is un- 

 able at present to conclude with Massee 

 that D. Ellisiana is a basidiomycetous stage 

 of the Ascomycete Lecanidion leptosperma. 



4. Additional Notes on the Bacterial Brown 

 Rot of Cabbages. De. Eewin F. Smith, 

 Department of Agriculture. 

 Additional studies bj^ the author have 



shown how the disease is disseminated, how 

 the infections take place, how it persists in 

 localities where it has once appeared, its 

 host plants and how it may be restricted. 

 An account of the economic aspects of the 

 disease has been published by the Depart- 

 ment of Agriculture as a Farmers' Bulletin. 



5. Occurrence of Kramer's Bacterial Disease 

 on Sugar Beets in the United States. De. 

 Eewin F. Smith, Department of Agri- 

 culture. 



This paper calls attention to the existence, 

 in parts of the United States, of a disease 

 of sugar beets resembling, if not identical 

 with, that described by Kramer and Sorauer 

 in 1891-1892, and more recently by Busse. 

 The characteristics of the disease were de- 

 _acribed. 



6. Are Blepharoplasts Distinct from Cehtro- 



somesf Me. Heebeet J. Webbee, De- 

 partment of Agriculture. 

 Blephaeoplasts, the speaker pointed out, 

 are special organs of the spermatic cells of 

 Zamia, Gingko and some Filicinese and 

 Equisetinese, which in certain stages of 

 their development somewhat resemble cen- 

 trosomes. Two are formed in each genera- 

 tive cell, arising de novo in the cytoplasm on 

 opposite sides of the nucleus and about mid- 

 way between the nuclear membrane and 

 cell wall. The division of the generative 

 cell results in the formation of two anthe- 

 rozoids, one blepharoplast being located in 

 each antherozoid cell. During the division 

 the blepharoplasts burst and the outer 

 membrane becomes gradually extended into 

 a narrow helicoid spiral band from which 

 the motile cilia of the antherozoid are de- 

 veloped. 



The blepharoplasts resemble typical cen- 

 trosomes : (1) in position, being located on 

 the opposite side of the nucleus, and (2), 

 in having the kinoplasmic filaments focused 

 upon them during the prophases of the 

 division of the generative cell. They differ 

 from typical centrosomes, however: (1) in 

 arising de novo in the cytoplasm ; (2) in 

 growing to comparatively enormous size ; 



(3) in not forming the center of an aster 

 at the pole of the spindle during mitosis ; 



(4) in having a diiTerentiated external mem- 

 brane and contents ; (5) in bursting and 

 growing into a greatly extended cilia-bear- 

 ing band, the formation of which is evi- 

 dently their primary function ; (6) in their 

 non-continuity from cell to cell. 



7. Spore Formation in some Sporangia. De. 

 R. A. Haepee, Lake Forest University. 

 This paper described the homologies in 



the modes of spore formation in a number 

 of Sporangia. 



8. Two New Organs of the Plant Cell. Me. 

 Walter T. Swingle, Department of 

 Agriculture. 



