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addition to the known local flora. Among Myxomycetes, which 

 were submitted to Professor Macbridefor final determination, and 

 among Fungi, the reported flora of Long Island has been found 

 most incomplete. The following representative genera, from the 

 list of this season's collections, will show how remarkably rich 

 Cold Spring Harbor is in the types usually chosen for laboratory 

 study, and what advantages it therefore offers both for local work 

 and for the collection of material for class use elsewhere : 



Anabaena, Lyngbya, the Oscillarias or Oscillatorias of laboratory 

 guides, and of course bacteria ; numerous Peridineae and diatoms ; 

 all the chief genera of Myxomycetes except Trichia ; Volvox, 

 " Proctococcus," Ulva and Monostroma, Spirogyra, desmids in- 

 cluding very large Closteriian, Bryopsis, Vaucheria, CladopJicra, 

 Bulbochaetc, Nitella (introduced by Dr. Johnson, now common), 

 Ectocarpus, Fucus and Ascophyllum, Nemalion, Agardhiella, Poly- 

 siplionia ; Albugo and Peronospora, Saprolegnia, Sporodinia, Mucor 

 of course, and Penicillium, Taphrina, Microsplidera, Pesiza, Cordy- 

 ceps, Ustilago, Paccinia, Fredo and Aeeidium,Exobasidium, Stereum, 

 Hydnum, Polyporus, Strobilomyccs (splendid material for the stud)* 

 of basidia and spores), Coprinus, Amanita, Scleroderma, Cruci- 

 bidum, Dictyophora ; Riccia, Marchantia, Conoccphalinn, Cepha- 

 lozia, Notothylas, Funaria, Dicraiium, Georgia, Polytrichum ; 

 Botrychium, Osmunda, Adiantitm, Pteridium, abundant undeter- 

 mined prothallia, Equisetum, Lycopodium and Selaginella. Mar- 

 silea is reported, but was not collected this year. Fully 80 per 

 cent, of these grow within a quarter of a mile of the laboratory. 



Geotropism of Fungus Stipes. — Work in physiological botany 

 has been attempted at Cold Spring Harbor this season for the 

 first time, and the wealth of un worked material has coaxed atten- 

 tion in various directions. The geotropism of the stipe of the 

 Boleti and agarics — Amanita is excellent material — is essentially 

 the same as that of phanerogams. All parts of the stipe are 

 irritable, and there is no evidence that the stimulus is transmitted. 

 But if the horizontal stipe is fastened at the pileus end, the base 

 being free, it may curve as much as 180 ; the zone of most rapid 

 growth, and therefore of most rapid curving, moves toward the 

 pileus, carrying the fixedly bent basal part beyond the perpen- 



