154 ENUMERATION OF FUNGI. 
ring-bracing threads are not present. I find them, however, 
in a species of Dictyonema, found in Guiana, and other 
parts of the New World, in which a distinct hymenium is 
produced in little patches, as in Cora. It is probable, then, 
that in every case, these threads are parasitical, and refer- 
rible to the genus Calothrix. Montagne points out, in 
Belanger's Voyage, the resemblance between these threads 
and Oscillatoria muscorum (Ag.) There is one peculiarity 
in those of the present plant, viz., that the external tube 
appears to be regularly reticulated; but this character is not 
easily seen till the rings have slipped out, though while they 
are in situ, they have, in consequence, occasionally a striated 
appearance, like that represented by Montagne, in the free 
rings under Dichonema sericeum, at E. The felting of the 
Calothriz with the real threads of the mycelium, may be 
explained by the growth of both keeping pace with each 
other; so that no sooner do new flocci spring from the 
mycelium, than a new crop of the Calothrix encroaches on 
them. I have given a figure of the parasite, which may be 
called Calothrix reticulata, and thus characterised : 
Calothrix reticulata; filis brevibus obtusis reticulatis ; an- 
nulis globoso-depressis vivide ceruleo-viridibus ; diametro 
2-brevioribus. 
Tab. VI. fig. 4.—a. Threads magnified, b. a portion of the 
tube more highly magnified, c. tip of thread and loose rings, 
highly magnified. 
28. Clavaria Surculus, (n. sp.) ; fusca, stipite equali vir- 
gato-ramoso, ramulis erectis solidis teretibus gracilibus acu- 
minatis. Cum. n. 2042. 
On the ground. 
About 3 inches high; stem rooting, with a few fibrous 
radicles, about 1 inch high, where it is forked and then di- 
vided in a paniculate manner into many erect branches, 
whose cylindrical acuminate branchlets, which are also erect, 
form a fastigiate tuft, 
Tab. VI. fig. 5.—Plant; nat. size. 
29. Spheeria (Cordyceps) fulvo-lanata (n. sp.) ; fasciculata, 
GC RETIA Vs = 
