AKmALS. 



Under the present heading we have included only the species of fungi which spec- 

 ially concern systematic mycologists and have thought it best to omit an enumeration 

 of the pathogenic forms which are specially treated in works on human or animal 

 pathology. By far the greater part of the latter belong to the ScJdzomycetes, an order 

 not included in the present work for reasons already stated in the preface. The fungi 

 like Trichophyton tonsurans, Microsporon Furfur, etc., to which is attributed the cause 

 of certain skin diseases and the Aspergilli which inhabit the external ear are found in 

 the United States as in other parts of the world but they are more conveniently treated 

 in medical than in botanical works like the present. There is a small number of fungi 

 which inhabit vertebrate animals which for the convenience of the student, may 

 be mentioned in this connection without any attempt to j^resent a complete list. 

 Sporendonema myophilum, Sacc. has been recorded on a living mouse and on the same 

 animal an unnamed Torula or Oidium has been noted by Leidy, Proc. Acad. Nat. Sci- 

 Philad. 1873, 260 ; Onygena equina, (Willd.) P. has occasionally been found on dead 

 hoofs of liorses while on bones of animals occur Fiisisponum ossicolum, B. & C. (Fusa, 

 rium ossicolum, Sacc.) ; Gymnoascella aurantiaca, Pk., referred by Saccardo first to 

 Myxotrichum and later to Gymnoascus ; Rliopalomyces elegans, Cda. and R. stranguJatus 

 Thaxter. On feathers of birds occuvs Fasarium gallinaceum, Cke. & Hark. On turtles 

 and frogs Achlya racemosa Hildb. and Ach. polyandra liildb. have been noted in this 

 country as well as an unnamed /SaproZer/wia on the salamander, Menohranchus lanceola- 

 tus. Saprolegnia ferax, (Gruitli.) Kiitz. has been reported on several kinds of fish, 

 especially salmon ; the doubtful fungus, Devoea infandihilis, Lockwood, occurs on ^y9- 

 pocampus heptagona m\di on diviedi codfish there is occasionally found Torula pulvinata, 

 Farl. {Oidium pulvinatum, Farl. nee B. & C. and 0. Morrhuae ¥q.y\.) . For the 

 animals below fishes we have included all the species of fungi, excluding Schizom- 

 ycetes, known to occur in the United States an<l we are indebted to Prof. Roland 

 Thaxter for revising the fungi found on insects. Among the latter Isaria sphecophila 

 Ditm. on Polistes sp. and Botrytis Bassiana Bals. on Hyphantria have been omitted, 

 the determination in those cases being eri'oneous. 



