Sheldon: a study of some Minnesota mycetozoa. 473 



On railroad ties near Two Harbors, Minn. {E. P. S., June, 

 1893). The Plasmodium of this species was found climbing up 

 the sides of ties. At first it has a white, curdled appearance. 

 Later on it assumes a drab and finally a brown color and is 

 covered with a thin, papery peridium. 



LAMPRODERMA Rost. Vers. Syst. Mycet. 7. 1873. 



22. Lamproderma arcyrioides (Sommf. ) Rost. Mon. 206. 



1875. 

 Stemonitis arcyrioides Sommf. in Tidsk. f. Natur. Vid. Christ. 1827. 

 Vermilion lake, Minn. {E. W. D. Holway, July, 1886); on 

 leaves and stems at Prospect Park, Minneapolis, Minn. {E. P. 

 S., April, 1895. 



COMATRICHA Preuss in Linnaea, 24:140. 1851. 



23. Comatricha pulchella (Bab.) Rost. Mon. Suppl. 27. 



1875 

 Stemonitiit pulchella hAl^. Trans. Linn. Soc. 1839. 

 Stemonitis teneiTima M. A. Curtiss in Am. Journ. Sci. Ser. II. 352. 



1848. 

 Stemonitis tenerrima B. & C in Grev. 2:69. 1873. 



Vermilion lake, Minn. (E. W. D. Holway, July, 1886). 



24. Comatricha aequalis Peck. Rep. N. Y. State Mus. 



Nat. Hist. 31:42. 1879. 

 Stemonitis aequalis Mass. Mon. Myxog. 80. 1892. 

 On decaying logs in the woods at Woodhull's Grove, Dakota 

 county, Minn. {E. P. S., July, 1893.) 



25. Comatricha stemonitis (Scop.)^ 



var. pumila (Cord a). 

 Stemonitis pumila Couda. Ic. 5:37. 1842. 

 Stemonitis typhina Mass. vslt. pumila Mass. Mon. Myxog. 75. 1892. 



(9) The synonoruy of the species might be indicated as follows: 



Comatricha stenioniti»$ (Scop.) 



Mucor ste7n()nUis Scop. PI. Oarn. 493. 1772. 

 Embolus lacteus 3 ACii. Muse. l:t. 8. 1778: 

 Clathrusfertxisxis Batsch. Elerich. Fung. f. 176. 178a. 

 Stemonilis typliinaRoTa. Fl. Germ. 1 :547. 1788. 

 Stemimitisfilidna ScnKH. Fl. Bav. 1782. 1789. 

 Trichia tinihoidex Bvi.ij. Hist. Ohanip. Fr. t. 447. 1791. 

 Stemonitis typhoidCHD. C. Fl. Fr. 3:257. 1805. 

 Stemonitis leucopodaFr. Cast. 16. 1&17. 

 Comatricha typhina Host. Mon. 198. 1875. 

 Stemonitis typhina Mass. Mon. Myxog. 74. 1892. 



