ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
635 
only a single germ-pore, it perforates the whole thickness of the endo- 
spore. In many species of Puccinia the endospore consists of only a 
single layer. In Coleosporium each spore is invested by only a single 
membrane, and is usually divided by septa into four cells. According 
to the author’s view, the teleutospores of Coleosporium are equivalent, 
strictly speaking, to basids or promyceles. In Chrysomyxa, also, the 
spores have only a single membrane. 
Most uredospores have also a distinctly recognizable exospore and 
endospore, the latter, again, often consisting of two layers. Those of 
Coleosporium and Chrysomyxa have, however, a very abnormal structure, 
and the author regards them as in no way equivalent to the uredoforms 
of the Uredineae, but as representing the aecidium-generation. The 
elevations which frequently occur on the surface of spores belong some- 
times entirely to the exospore, sometimes also partly to the endospore. 
Two kinds of pigment are found in the membranes of uredospores 
and teleutospores — one soluble, the other insoluble in water. The latter 
occurs in all brown membranes of uredospores, and in the brown para- 
physes of many species ; the former in the membrane of teleutospores, 
rarely in that of uredospores. The soluble pigment is found only in 
those species the teleutospores of which are firmly attached to the host- 
plant. 
Puccinia parasitic on Saxifragaceae.* — Herr P. Dietel identifies 
Puccinia Saxifragse , parasitic on Saxifraga granulata and carpathica , 
with the fragilipes form of P. Chrysosplenii, parasitic on Chrysosplenium 
alternifolium and oppositifolium, the persistens form of this species being 
suppressed. He also identifies P. pallido-maculata , parasitic on Saxi- 
fraga punctata in Colorado, with P. Adoxse , parasitic on Adoxa both in 
that State and in Europe, and founds on this fact an argument for placing 
Adoxa among the Saxifragaceae, rather than among the Caprifoliaeeae or 
Araliaceae. 
New Uredineae. j- — Herr P. Magnus describes two new species of 
Uredineae : — Diorchidium Steudneri , parasitic on Ormocarpum bibracteum 
(Leguminosae) from Abyssinia, and Cseoma circumvallatum on Geum 
Jieterocarpum from Armenia ; the latter is characterized by the sterigmas 
being surrounded by a wall of parapbyses. 
In another communication + the same author makes Triphragmium 
Acacise the type of a new genus Sphserophragmium, characterized by the 
teleutospores consisting of from four to nine cells, which are not ar- 
ranged in a row, as in Phragmidium , but form a spherical or ellipsoidal 
body. 
Himalayan Uredineae.§ — After describing a new species of Puccinia , 
P. ( Cseoma ) Smilacis , parasitic on Smilax aspera, the late Dr. A. Barclay 
discusses the characters of the alleged genus Cseoma , and sees no good 
ground for separating it from AEcidium. 
In another memoir the same author describes a teleutospore-, a 
uredo-, and an aecidio-form of Puccinia , all parasitic on different species 
* Ber. Deutsch. Bot. Gesell., ix. (1891) pp. 35-45 (1 pi.). 
t Tom. cit., pp. 91-100 (1 pi. and 1 fig.). + Tom. cit., pp. 118-24 (1 pi.). 
§ Scient. Mem. by Med. Officers of the Army of India, pt. vi. (1891) 5 pp. and 
1 pi., and 4 pp. and 2 pis. Cf. this Journal, ante, p. 231. 
