194 PROCEEDINGS OF THE ACADEMY OF [1890. 



color. Spores and capillitiuni concolorous, being a bright yellow 

 color in mass. 



Elaters cylindrical, 3.75 to 4 p.. in diameter terminating in 

 short, sharp, smootli ends 4 to 6 //-. long. Elater spirals 4 in 

 number, spinulo.se with numerous irregular spines, coarse, winding 

 irregularly. Adjoining .spirals often united with each other by in- 

 terspiral branches whicli run either longitudinally or obliquely in 

 the direction of the spirals. 



Sjiores 12-13 p. in diameter, delicately warted when examined 

 under a high power lens. 



Shawaugunk and Adirondack Mts., N. Y. 



This Trichiais conspicuous for the checkering or areolation of the 

 upper surface in the perfectly mature sporangia, showing a sharp 

 contrast between the adjoining nut brown and bright yellow 

 colors. In this respect it resembles Tr. fragilis which sometimes 

 exhibits in its var. lateritia and also in one of its simple forms, a dull 

 mottling of the color of the upper surface of the sporangia. 



The following species of Myxomycetes, also among those issued in 

 the same Century, present special points worthy of record : — 

 Didymium eximium Pk., No. 2493. 



The specimens distributed under this number correspond with the 

 type of the species in the Herbarium of the N. Y. State Museum of 

 !Nat. History in Albany. 



The thick yellow papyraceous or crustaceous walls of this inter- 

 esting Didymium are generally permanent at the base, forming a sort 

 of receptacle or cup. Tlie white surface crystals of lime character- 

 istic of the genus are scanty and occasionally wanting. The colu- 

 mellas are yellow in color, discoid, exceedingly rough on the upper 

 surface and sometimes spinulose even to the extent of long spicules 

 (in exceptional cases), penetrating to one-third the height of the 

 sporangia. 



The specimens under Xo. 2089, N. A. Fungi E. and E., which 

 were also distributed as D. eximium Pk. differ in many respects 

 from those just described, the sporangium walls being thin, mem- 

 branaceous and translucent, when divested of the abundant, snow- 

 white crystals of lime by which they are covered. The stipes are 

 longer, darker and more slender, and the columellas, also discoid, 

 are less roughened above and either pure white or yellowish-white 

 in color. The spores in both forms are delicately warted when seen 

 under a high power lens. 



