46 ROCHESTER ACADEMY OF SCIENCE. [March 24, 



Among the Hydneae we have only the very common genera Hydnum, 

 Irpex, and Grandinia. 



The Thelephorei (4th family) are also well represented by species 

 of Corticium, Stereum and other genera. We have the rare Corticium 

 lividocozruleum, Karst, new to the state, and, probably to the country, 

 which agrees with an authentic specimen from Karsten, and a new 

 species, the Corticium rhodellum, Peck, of a beautiful rose color. 



The Clavariae are only sparingly represented by a few common 

 forms. 



The peculiar gelatinous family Tremellini is represented by species 

 of Tremella, Exidia and Dacrymyces, which are commonly found on 

 moist hemlock stumps. 



The next order ot fungi the Gasteromycetes or puff-balls is known 

 only by a few common puff-balls, one member of the offensive Phalloids 

 and Nidularia pulvinata, Schw, a species rarely occurring in the state. 



The order Phycomycetes is represented by a number of "blights " 

 and " moulds." In wet seasons the blights are a source of great 

 annoyance from the wide spread damage done to field and garden 

 crops. It is only necessary to mention the Peronospora viticula or grape 

 blight, and the Peronospora gangliformis, DeBy, the lettuce blight, to 

 prove this. 



The Myxomycetes or slime moulds, a group of remarkable organ- 

 isms, which have occupied debatable positions in various systems of 

 classification, are represented by 17 species. During the vegetative 

 portion of their life history these organisms consist of naked masses of 

 protoplasm, the so-called plasmodia, variously colored, and possessing 

 the power of changing their forms and places, and hence are said to be 

 motile. Under proper conditions, this protoplasmic vegetative state 

 ceases, and a resting state is entered upon, with the formation of spores 

 in spore cases, or sporangia, which assume resemblances to puff-balls, 

 or other fungi. They have always been objects of great interest not 

 only from their curious life history, but also from the delicacy of their 

 fructification and the beauty of their spores and threads, when investi- 

 gated by the microscope. We have some of the rare forms of this 

 order, as well as the common genera Fuligo, Trichia and Arcyria. We 

 have also one new species a Didymium {Didymium Fairmani, Sacc.) found 

 growing on the lower surfaces of leaves of Smilacina bifolia, which will 

 be noticed later on. 



Taking up for our next consideration the rusts and smuts we find 

 the list includes 51 species. The genera represented are sEcidium, 

 Puccinia, Uromyces, Phragmidium, Melampsora, Coieosporium, Roestelia 



