624 Transactions. É 
I wish to record my thanks to Mr. W. D. Reid, who has contributed the 
major number of the specimens in my herbarium; to Mr. E. H. Atkinson 
(Biological Laboratory), who has contributed large numbers of specimens, 
and who has undertaken the difficult task of verifying all host plants; 
to Messrs. H. H. Allan, A. H. Cockayne (Government Biologist), R. Waters, 
and many others for contributions of specimens ; to Mrs. F. W. Patterson 
(Mycological Exchange Bureau, Washington), Dr. J. R. Weir (Director 
the Forest Pathology Bureau, Washington), Mr. L. Rodway (Governmen 
Botanist, Hobart), and Mr. C. C. Brittlebank (Plant Pathologist, Mebo 
for material for comparative purposes; to Dr. W. B. Grove (University o 
Birmingham) for determination of species ; Dr. E. J. Butler (Ded 
Imperial Bureau of Mycology) for looking up literature, and verifying refer- 
ences and authorities; Dr. L. Cockayne, F.R.S., for verifying authorities 
of many of the host plants; to Mr. J. G. Myers, B.Sc., for writing Latin 
diagnoses of all new species; and to Mr. E. Bruce Levy for the preparation 
of all the photographs used in this work. is 
have found the following books particularly useful: British ~ 
Fungi (W. B. Grove); North American Flora (Uredinales), vol. 7; (J. C. 
Arthur); Rusts of Australia (D. McAlpine); Sylloge Fungorum (P. A. 
Saccardo) ; and Thesaurus (Lindau and Sydow). , 
All drawings were made with a camera lucida from spores mounted in 
a 50-per-cent. solution of lactic acid in water. Surface sculpturings have 
been studied from material mounted dry. Drawings are all to the same 
scale (unless otherwise specified), and have all been reduced the same 
amount ; they were originally magnified 1,000 diameters. All descriptions 
are original and are drawn up from material in the herbarium of the author. 
CLASSIFICATION. 
Only those families and genera that occur in New Zealand are considered 
here. 
Uredinales. 
Microscopic fungi which are obligate parasites on ferns and higher plants. 
Mycelium branched, filamentous, septate, developing within the host-tissues, 
intercellular, sending haustoria into the host-cells ; producing MES 
which are borne in sori below the surface, or rarely singly within the hos 
tissues. Sori naked, enclosed by peridia or paraphyses, or embeddeu e 
a thin stroma. Teleutospores on germination producing a short, four-ce 
basidium, on which basidiospores are borne. = 
The order may be divided into the three following families :— 
A. Germination by the formation of an internal basidium 
of four superimposed cells : 
Teleutospores in one or (rarely) two layers, forming 
waxy, bright-coloured crusts ; one-celled, s 
seated on dilated hyphal cells; aecidia with 
definite peridia; uredospores catenulate, or 
singly, not enclosed in peridia . . II. CoLEOSPORIACEAE. 
ingly on definite pedicels Я . MELAMPSORACEAE. 
uredospores soli on definite joels, : 
MU pam ^ = Pi .. ПІ. PUCCINIACEAE. 
