a a 
Se ee Pe ere 
ae ee ey 
ii is 
Mr. G. Hodge on the Development of a Species of Pycnogon. 33 
by Corda) of the spirals renders it necessary to view these ap- 
pendages also in another light; in fact, this character seems to 
connect Myzxotrichum with Helicosporium and similar genera, 
where the filaments bear strings of sporidia coiled up into 
spirals, and at the same time to show, as indicated in fig. 4. 
Pl. VL., the intimate connexion subsisting between the ordinary 
spores of the Hyphomycetes, whether arranged in chains or 
occurring singly, and the bodies termed conidia. 
Hitherto our information concerning the position of this 
fungus has been but scanty. In the ‘ Micrographic Dictionary’ 
of Griffith and Henfrey (ed. 2, p. 483), the genus Myzxotrichum, 
to which our present species was referred by Kunze, is thus 
noticed :— “A genus of Dematiei, growing on rotten wood, 
paper, &c. Three species are described as British—M. cesium, 
Fr., M. chartarum, Kze., and M. deflecum, Berk. They form little 
tufts or downy balls, sending off radiating branched filaments. 
The spores are described as occurring collected in masses about 
the base of the threads (?).”” In Mr. Berkeley’s ‘ British Fungo- 
logy’ (p. 353), the genus Myzotrichum is referred to the Muce- 
dines, and its characters given as follows :—“Flocci branched, 
bearing towards their base little conglomerate masses of spores.” 
Corda placed his genus Actinospira among the Sporotrichacez, 
describing it thus :— 
“ AcTINosPiIRA. Flocci ramosi, continui, cornei; sporis simplicibus, 
basi in glomerulos coloratos heterogeneos conglutinatis. 
“ 4. chartarum, Corda, tom. vi. tab. 2. fig. 23. Acervulis subglo- 
bosis ; sporis ooideis aureis.” 
Mr. Berkeley, to whom I am indebted for my information as 
to the history of the present plant, tells me that it is supposed 
to be a condition of some Chetomium. I hope my observations 
and the figure given may aid in determining its true relations. 
Mr. Berkeley’s Ascotricha chartarum* presents, in the appear- 
ance of the thallus and conidiat+, a slight approach to the cha- 
racter of the young plants of Myxotrichum figured in my draw- 
ing; but the genera to which the plants belong are, so far as 
present observations go, quite distinct. 
1X.—Observations on a Species of Pyecnogon (Phoxichilidium 
coccineum, Johnston), with an attempt to explain the Order of 
its Development. By Grorce Honer. 
[Plates IV. & V.] 
THE generation and development of the Pyenogonoidea, to the 
best of my knowledge, have hitherto received a very small share 
* Ann, Nat. Hist. ser. 1. vol. i. pl. 7, p. 257. t Ib. pl. 7. fig. 8 d. 
Ann. & Mag. N. Hist. Ser. 3. Vol. ix. 3 
