226 Ike Scottish Naturalist. 



distinct species are in fact only less fully developed forms of 

 species referred, when matured, to widely different groups. In 

 the present state of our knowledge, there is a practical advantage 

 in treating them as distinct, if their mutual relations are not for- 

 gotten, since many of them are seldom met with in all the forms, 

 and many, indeed most, of the lower forms cannot yet be referred 

 to their mature conditions. 



Probably in no long time it will be possible to issue a satisfactory 

 and reliable Mycologia Scotica, and Mr. Stevenson deserves our 

 thanks for the important advances made by him in securing a basis 

 for this. 



Province of Dee. 

 Hymenomy cetes . 



wAgaricus carcharias Pers., nA. metachrous Fr., A. Saundersii Fr., nA. 



melinoides Fr. 

 Paxillus atrotomentosus Batsch. 

 ^Russula Queletii Fr. 

 Polyporus pubescens Schum. 

 ^zTyphula Grevillei Fr. 

 /zNsematelia virescens Corda. 

 Exobasidium Rhododendri Cr. (=E. vaccinii Wor. var.) 



Myxomycetes. 



Fuligo varians Sommf. 

 izCraterium leucocephalum Pers. 

 ^Chondrioderma Michelii Lib. 

 ^Comatricha Friesiana De Bary. 

 Plasmodiophora Brassiere Wor. 



Coniomycetes. 



nLeptoslroma donacinum Sacc? var. majus Trail ; L. Juncacearum Sacc. 

 Cytospora foliicola Lib. 



Phoma superflua Sacc., «P. Asteriscus Berk., //P. Samarorum Desm. 

 Ascochyta teretiuscula S. and R. 

 Coniothyrium conoideiim Sacc. (in same perithecia with Leptosphaeria conoidea 



De Not.) 

 Diplodia obsoleta Karst. 

 Diplodina Ammophilse Trail. 



Hendersonia Sparganii Niessl, H. culmiseda Sacc, H. Equiseti Trail. 

 Stagonospora Caricis (Oud.) Sacc, S. paludosa S. & Sp., S. Heleocharidis 



Trail ; S. Typhoidearum (Desm.) Sacc. (This is Darluca Typhoidearum, 



B. and Br. in Cook's Handbook, No. 1286.) 

 n Vermicularia trichella Grev. 

 Melasmia alnea Lev 



