174 
ENDOSPOREiE. 
[hemitrichia. 
been exposed to unusual conditions of development. 0. Bavaricum 
Balf. & Berl. is described as distinguished from 0. nitens by the 
more distinct spirals on the elaters, but the spirals are as distinct in 
Libert's type of the species ; the spores of the Bavarian gather- 
ing vary in size from 12 to 16 /i, and the reticulation also varies 
so as to present from four to sixteen meshes on the surface of the 
hemisphere. The type specimens of 0. flavidum Peck and 0. hrevi- 
filum, Peck dilfer from one another only in the former having more 
papillose and longer elaters than the latter, and spores measuring 
12 to 14 /X, while in 0. hrevifilum they measure 10 to 12 /x ; they 
scarcely differ from the specimen named 0. Bavaricum, and are here 
included under 0. nitens. The type specimens of 0. minutulum Mass., 
from Algiers (B. 1739), and Physarum Schiceinitzii Berk., from Beth- 
lehem, U.S.A. (K. 1738), are typical 0. nitens. The descriptions of 
Trichia Kickxii Rost. and T. pusilla Schroet. agree so perfectly with the 
character of 0. nitens that they are here placed as synonyms of this 
species. 
Jffab. On dead wood. — Near Birmingham (L:B.M.144); Belgium 
(B. M. 747); Germany (Strassb. Herb.); Bavaria (B. M. 746); 
Algiers (K. 1739); Philadelphia (L:B.M.144); Ohio (L:B.M.144) ; 
Iowa (B. M. 1031) ; S. Carolina (B. M. 960, 961, 964). 
SPECIES NOT MET WITH IN THE QUOTED COLLECTIONS. 
2. 0. aeneum Karst., Myc, Fenn., iv., in Bidr. Kann. 
Finl. Nat. (1879), p. 131. Sporangia densely crowded, often 
confluent and vein-Kke, rarely scattered, globose, or angled by 
mutual pressure, depressed, shining, metallic copper, greenish 
or olivaceous ; capillitium tubes free, with scattered ring-shaped 
thickenings, 2 to 3 /a thick; spores warted, reddish- or pale 
yeUowish-ochre, 12 fj. diam. 
Hab. On pine-wood. — Mustiala, Finland. 
3. 0. furcatum Bucknall, in Mass., Mon., p. 173. Sporangia 
scattered, globose, shining, bright chrome-yellow, as well as the 
capillitium and spores; elaters cylindrical, simple or branched, 
slightly thickened at the obtuse ends, with a faint open spiral, 
3 to 4 ;u, diam. ; spores globose, minutely warted, 11 to 12 /a diam. 
Eab. On a rotting trunk.— Abbots Leigh, Somerset, England. 
SPECIES EXCLUDED FROM THE GENUS. 
0. Broomei Mass. = Perichcena x>opulina Fr. 
Genus 35.— HEMITRICHIA Rostafinski, Yersuch, p. 14 (1873). 
Sporangia stalked or sessile; capillitium an elastic network of 
more or less branching threads, thickened with two to six spu-al 
bands; spores minutely warted or reticulated. HEMIARCYRIA 
Eost., Mon., p. 261 (1875). 
I have restored the original name which Rostafinski gave to this 
genus, being in accordance with the laws of botanical nomenclature, 
while at the same time it expresses more accurately the affinities ot 
the group. 
