28 Transactions. 
orbicular, 0-5 mm. diam., on stems elliptical and up to 2mm. long, 
pulvinate, pulverulent, surrounded by the ruptured epidermis ; mixed 
with numerous incurved, hyaline, capitate paraphyses. Spores subglobose, 
obovate or broadly elliptical, 18-24 x 14-18 mmm. ; epispore hyaline, 
closely and finely verruculose, 2 mmm. thick ; germ-pores equatorial, 
obscure. 
III. Teleutosori amphigenous and caulicolous, scattered or crowded, 
often confluent and up to 8 mm. long, irregular, discoid, reddish-brown, 
becoming shining-black, long covered. Spores laterally compacted, sub- 
epidermal, prismatic, unicellular, 40-55 x 9-15 mmm.; apex obtusely 
rounded or truncate, slightly (3 mmm.) or not thickened, base truncate 
epispore smooth, brown, 1 mmm. thick ; germ-pore obscure, apical. 
Hosts :— - 
Linum monogynum Forst. On leaves and stems. Herb. Nos. 241, 
297. П. York Bay (Wellington), E. Н. Atkinson! 24 Oct., 1920. 
IL, III. Seashore, Seatoun (Wellington), E. H. Atkinson! 27 Jan., 
1921. 
Linum monogynum Forst. var. chathamicum Cockayne. II. York 
Bay (Wellington), E. Н. Atkinson! 23 Jan., 1921. — 
Distribution: Europe; North and South America; Australia. 
Both hosts are endemic; they are especially abundant along the sea- 
coasts. (Cheeseman, 1906, p. 86. 
e uredosori are common, and are conspicuous owing to their bright 
orange colour. The teleutosori appear to be rare here, as only a few sori 
have been found on the abundant material in hand. 
2. MELAMPSORIDIUM Klebahn. 
Kleb., Zeits. Pflanzenkr., vol. 9, p. 21, 1899. 
Heteroecious. Cycle of development includes O, I, II, III. 
permogones globose, flattened, without ostiolar filaments. 
I. Aecidia with a well-developed peridium, inflated, cylindrical, erumpent. 
Aecidiospores globose or elliptical, epispore hyaline, minutely and densely 
verruculose, thin. 
I redosori immersed, enclosed within a definite peridium, openin 
П. Teleutosori indehiscent, subepidermal. Teleutospores compacted 
laterally into flattened layers, unicellular, elliptical or prismatic ; epispore 
Distribution : Europe ; Asia; North America. The solitary New Zea- 
Is genus is separated from Melampsora on account of the presence 
of a definite peridium surrounding the aecidio- and uredo-spores, and from 
Pucciniastrum on account of the teleutospores being laterally compacted 
into waxy layers. It would thus appear to be an intermediate genus, the 
and П stages linking it with Pucciniastrum, and the teleutospores with 
M elampsora. 
