80 A Monogrnpli of the Miixogaatres. 



mm. long, 0"7 — 0'6 mm. thick ; smooth when moist, rugulose 

 when dry, sub-contorted, extended into the sporangium as a 

 cokimella, not reaching to the apex; sporangium cylindrical, 

 rarely sub-clavate, rounded at both ends, 0*8 — 1'2 mm. long, 

 0"3 — 0"2 mm. thick, black, ajyaqiic, wall persistent fm^ a long 

 time; capillitium springing from the columella, forming a 

 rather dense network, the swperjicial meshes equal to or tioice the 

 diameter of the spores, with uncinate free tips ; spores globose 

 or sub-elliptical, 5 — 8 /x diameter, perfectly smooth, smoky brown. 



Stemonitis Jtuminensis, Spcg., Fung. Arg., N. 261 ; Sacc, Syll., 

 vii., 1, n. 1366. 



On bark, moss, &c. Brazil. 



Stemonitis subcaespitosa, Mass, 



Stems subcaespitose or loosely clustered, thickened at the 

 base, about half the length of the sporangia, extending through 

 the capillitium as a columella; peridia ovate-oblong, obtuse, 

 fugacious ; capillitium growing from the columella, reticulately 

 connected and also forming a superficial net with coarse meshes, 

 blackish ; spores globose, even, (smooth ?), blackish-brown, 

 •0004— -00045 in. in diameter. 



Comatricha sulcacspitosa, Peck, 43rd Report, New York State, 

 Mus. Nat. Hist. (1890), p. 25, PI. iii., figs. 6—9. 



Decorticated wood of hemlock. Tsuga Canadensis. Sandlake. 

 July. 



This species resembles Stemonitis fusca in colour. In size 

 it approaches Comatricha typhina. Its capillitium is variously 

 connected, and appears to combine the reticulation of Comatricha 

 and Stemonitis, but on account of the network not being wholly 

 parallel to the walls of the peridium, it is placed in Comatricha. 

 The plants are mostly connected in small groups or loose 

 clusters of two to ten individuals. Its coarser meshes and 

 larger spores distinguish it from Comatricha typhina. (Peck, 1. c). 



Stemonitis aequalis, Mass. 



Gregarious or loosely clustered, about three lines high, arising 

 from a thin hypothallus ; sporangia cylindrical, obtuse, fugacious, 



