A NEW edition of the Naturalists’ Directory has recently been 
issued by S. E. Cassino, Salem, Mass. This directory is in- 
valuable to naturalists, since it is a means of bringing together 
students and collectors in all parts of the world through cor- 
respondence. It contains an alphabetical list of English speaking 
professional and amateur Naturalists in all parts of the world, also 
a list of Scientific Societies and Periodicals. The price of the 
Directory is $2.50 in cloth binding, and $2.00 in paper binding. 
Sent postpaid. Address as above. 
BOOKS FOR SALE 
By A. j. GROUT, New Dorp, Richmond Borough, N. Y. 
Gray, Plantae Wrightianae $ 3.00 
Fern Bulletin, Vols. VII to XIX, incl 9.00 
Torreya, Vols. I to VII 7.00 
Memoirs Torrey Botanical Club, Vols. I to XIII 35.00 
Plant World. Vols. I to X 15.00 
Leidy, Fresh Water Rhizopods 5.00 
Lesquereux & James, Manual of North American Mosses. 7.00 
Barnes & Heald, Keys to North American Mosses 2.00 
Gray, Manual, Ed. I. 1848 3.00 
Britton, Manual N. E. States and Canada, Ed. 1 2.00 
Britten, European Ferns 3.50 
Newman, History of British Ferns 1.50 
Druery, Book of British Ferns 1.00 
Cooke, Handbook of British Hepaticae 1.50 
Clute, Our Ferns in Their Haunts 1.50 
Grout, List of Vermont Mosses, with Supplement .15 
Grout, Illustrated Glossary of Bryological Terms. .10 
Small, Flora of Southeastern U. S. Ed. 1 3.50 
Audubon, Quadrupeds of North America, Pts. 1 and 16, each 2.00 
Rhodora, Vols. I to XIV, incl 10.00 
American Botanist, Vols. I to XVIII, incl 10.00 
John Torrey, Natural History of New York, Vols. I and II, with 162 colored plates 10.00 
Same, plates uncolored 5.00 
Odd numbers and volumes of the Bryologist, and slightly damaged copies of Mosses with a 
Hand-lens, and of Mosses with Hand-Lens and Microscope at greatly reduced prices. 
Manual of Mosses of Western Pennsylvania 
By 0 . E. JENNINGS, Ph. D., 
CARNEGIE MUSEUM AND UNIVERSITY OF PITTSBURGH 
A Manual, with full descriptions and keys, dealing with all mosses known to 
occur in the western half of Pennsylvania, including also species of adjacent 
regions which are to be expected within the region covered. Illustrated by 
fifty-four pages containing more than two thousand figures from original draw- 
ings of specimens collected in the region embraced. 
Printed upon light, unglazed stock, bound in stiff paper, 6x9 inches, 429 pp. 
Edition limited to 250 copies; for sale at $2.75 each, by mail, $2.88. 
ADDRESS 
DR. O. E. JENNINGS 
CARNEGIE MUSEUM 
PITTSBURGH, PENNA. 
