No. 423:] NOTES AND LITERATURE. 255 
The modes of preserving pileate fungi without loss of their natural 
colors are reviewed by Lutz in the December Bulletin de la Société 
Mycologique de France. 
Heft 9 of Schimper’s Botanische Mittheilungen aus den Tropen con- 
sists of Alfred Moller’s studies on Brazilian phycomycetous and 
ascomycetous fungi, and is fully and well illustrated. 
No. 44 of the Korrespondenzblatt des Naturforscher- Vereins zu Riga 
contains a list of the twelve truffles occurring in the Baltic district. 
In No. 8 of his serial Mycological Notes, Mr. C. G. Lloyd figures 
several species of Scleroderma, Geaster, and Mycenastrum. 

Dr. Thaxter's epoch-marking'work on Laboulbeniacez furnishes. 
the text for a popular article by Mr. Massee in the November number 
of the Journal of the Quekett Microscopical Club. 
The genus Fusarium, which includes several species growing on 
dead animal matter of various sorts, receives an interesting addition 
under the name F. eguinum, described in Science of December 6 by 
Novgaard as occurring in the hair follicles and sébaceous glands of 
horses in Oregon. 
A monograph of the genus Aspergillus, by Weimer: is sepiräiely 
published from the Mémoires de Ta — de io adams et d' Histoire 
Naturelle de Genève, Vol. XXXIII. ` 
In the Bulletin of the Torrey Botanical Club for December, Pro- 
fessor Arthur publishes descriptions of a considerable number of 
new Uredinez. 
The effects of Rhizoctonia on the potato plant are discussed in 
Science for December 6, by F. M. Rolfs. 
The fungi causing spot diseases of the cherry, etc., are discussed 
in an illustrated article by Aderhold in the December number of 
Landwirtschaftliche Jahrbiicher. 
Leaf diseases of the currant are considered by Stewart and Eustace 
in Bulletin No. 199 of the New York Experiment Station. 

PETROGRAPHY. 
** Perknite,” a New Rock Term. —Turner,! in a recent article, 
suggests the use of the term * perknite ” as the designation of coarse-. 
grained lime-magnesia rocks composed essentially of monoclinic 
1 Journ. Geol., vol. ix (1901), p. 507- 
