48 Transactions. 
Habitat: Parasitic upon the spermogones, aecidia, uredosori, and 
teleutosori of numerous Uredinales ; saprophytic upon the leaves of de- 
Distribution: Europe; North and South America; Africa; Ceylon ; 
Japan; Australia. 
Although eight species have been described, only one has been collected 
here. 1% is probable that many of these so-called species are but variable 
forms of D. Filum, as in many instances they appear to have been erected 
on slight differences in the size of the spores, a character too variable to 
be considered specific ; for, as is shown below, in D. Filum alone the spores 
on different hosts range in length from 10 to 18 mmm. ; furthermore, this 
variation may be seen in the spores from a single pycnidiu m. 
l. Darluca Filum Castagne. (Text-fig. 126, and Plate 2, fig. 5.) 
Uredinales. 
Cast., l.c. 
Sphaeria Filum Biv.-Bern., Bernh. Stirp. rar Sic. Manip., vol. 3, p. 12, 1815. 
Phoma Filum Fr., Syst. Myc., vol. 2, p. 547, 1823. 
Pyenidia superficial or immersed, scattered or gregarious, conico- 
globose, elliptical, obovate, or depressed-globose, 90-120 x 60-100 mmm 
diam., ostiolate, smooth, black. Conidia 1-septate, hyaline, fusoid, smooth, 
10- 18 x 3-6 mmm., slightly or not constricted at the septum, muticate. 
Habitat : Parasitic upon the spores of the following species: Uromyces 
olakou б. Н. Cunn. (П); U. Polygoni Fel. (П); Uromycladium alpinum 
MeAlp. (П); Urom. notabile Me cAlp. (II); Urom. Tepperiamum (Sacc.) 
McAlp. (III); Puccinia Caricis Schroet. (II, III) ; P. Chrysanthemi Roze 
(П); Coprosmae Ске. (III); Р. D P Westnd. (П); Р. Hoheriae 
Wakef. (Ш); P. Hydrocotyles Ске. (П); Р. juncophila Ске. et Mass. (П); 
Р. Morrisoni McAlp. (П); P. Рыа McAlp. (П); Р. Poarum Niels. 
(ID; E pulverulenta Grev. (II); P. punctata Link. (П); Р. whakatipu 
G. Н. Cunn. (П); P. Unciniarum Diet. et Neg. (II, II); Phragmidium 
novae-zelandiae G. Н. Cunn. (D; Phr.. Potentillae P. Karst. (I, П); 
Fic. 1.—Phragmidium Acaenae G. H. Cunn. Caeomata and юн f from Acaena 
microphylla Hook. f. Arrows point to the minute teleuto 
Fic. 2.—Phragmidium novae-zelandiae G. H. Cunn. "Teleutosori m jM novae- 
zelandiae 'T. Kirk. 
Fig. 3.—Phragmidium Potentillae P. Karst. Teleutosori on нос» Sanguisorbae Vahl. 
Fic. 4.—Hamaspora acutissima Syd. Teleutosori on Ru ustralis Forst. f. Note 
the long and much-entwined fibrils, Arrow mE to sori from which the 
{ peared. 
Fie. 5.— Milesina Histiopteridis G. Н. Cunn. Uredosori on Histiopteris incisa 
unb.) J. Sm. The white spots consist of sides uredospores which 
have exuded from the immer: ridia. 
Fic. 6.—Melampsora Lini Desmaz. Teleutosori on Linum monogynum Forst. 
Ето. 7.—Aecidium Milleri G. Н. Cunn. on Aristotelia serrata (Forst.) Oliver. 
f. 
Fic. 8.—2 tum Ranunculacearum DC. on emen us Lyallii Hook 
Fic. 9.—Aecidium hupiro Н. Cunn. on C idissima Forst. 
Ето. 10.—Aecidium е i G. Н. Cunn. on Bdwardsia ор (J. Mill.) Oliver. Photo 
by e Le evy. 
Ета. Т дан | M yopori G.-H. Cunn. on Myoporum laetum Forst. f. 
Natural size. All photographs, with the exception of fig. 10, by the writer. 
