\V. C. Sturgis — Type-Specimens of Myxomycetes. 



489 



Of the thirty-two species retained among the Myxomycetes by that 

 author, I have been obliged to recommend that three names be dis- 

 carded on the ground of the insufficiency, for purposes of accurate 

 identification, of the original descriptions, and of lack of type- 

 material. These species are Physarimi ornatum, Physarxitn hiteo- 

 luni, and Didymhim angulatuni. In the case of three species, viz., 

 Stemonitis Morga7ii., Comatricha subccespitosa, and Comatricha 

 loi^ga, the type-specimens were not accessible to me and I have, 

 therefore, referred them doubtfully, relying upon the original descrip- 

 tions and upon the fuller notes published by other observers. The 

 remaining 26 species I have I'eferred as follows, confirming in most 

 cases the judgment of one or the other of the two leading authori- 

 ties on the group, Mr. Lister and Professor Macbride. 



Badhamia magna, Pk. = 



Crateritim obovatum, Pk.= 



Physarnm albicans, Pk. \ 



" " var. subroseum, Pk. ) 



" atrorubrum, Pk.= 



" intequale, Pk.= 



" pulcberripes, Pk.= 



" citrinellum, Pk.=: 



" flavidiim, Pk.= 



Fiiligo oebracea, Pk.= 



Physarella mirabilis, Pk.= 



Diderma flavidiim, Pk.:= 



Chondrioderma criistaceum, Pk.= 



Diderma farinaceum, Pk.= 



Diachsea splendens, Pk. = 

 " subsessilis, Pk.= 



Didymium oxalinum, Pk. = 

 " coniiatum, Pk.=: 



" eximinm, Pk.= 



Stemonitis lierbatica, Pk.=: 

 Comatricha sequalis, Pk.= 

 Perichseua ctespitosa, Pk.= 



Trichia reniformis, Pk. = 

 Oligonema flavidum, Pk.= 

 " brevifila, Pk.= 



Arcyria macrospora, Pk. = 



Agricultural Experiment Station, 

 New Haven, Conn. 



Badhamia magna, Pk. 



" rubiginosa, (Chev.)Eost. 



; Physarnm globnliferum, (Bull.) Pers. 



pulcherrimnm, Berk. & Rav. 

 lateritium,(Berk.& Rav.) Rost. 

 Ra venelii, (Berk. & Curt.) Mass. 

 citrinellum, Pk. 



Fuligo ochracea, Pk. 

 Physarella oblonga, (Berk.& Curt.) Morg. 

 Physarum contextum, Pers. 

 Chondrioderma globosum, (Pers.) Rost. 



' ' spumarioides, (Fr.) Rost. 



Diachtea splendens, Pk. 

 " subsessilis, Pk. 

 Physarum cinereum, (Batsch) Pers. 



" nephroideum, Rost. var. glo- 



bosum. 



Didymium nigripes, (Lk.) Fr. 



Stemonitis ferruginea, Ehrenb. 



Comatricha nigra, (Pers.) Schroet. 



Lindbladia effusa, (Ehr.) Rost. var. sim- 

 plex, Rex. 



Trichia contorta, (Ditm.) Rost. 



Oligonema flavidum, Pk. 



" flavidum, Pk. var. brevifila 



Pk. 



Arcyria ferruginea, Saut. 



