Musci Acrocarpi Boreali- America ni 



Fascicle 13, Nos. 301-325 now ready. Price $2.00 per fascicle: Indispen- 

 sible to the working bryologist; early fascicles partly exhausted; order now. 



PROF. JOHN M. HOLZINGER, Winona, Minn. 



CANADIAN HEP ATICAE.-Sets for sale. Nos. 1-20 



now ready, $1.50 per fas- 

 cicle of 20 numbers. Others to follow at same rate. Address 



MR. A. H. BRINKMAN, Dowling Lake, Alberta, Canada. 



Manual of Mosses of Western Pennsylvania 



By O. E. JENNINGS, Ph. D., 



CARNEGIE MUSEUM AND UNIVERSITY OF PITTSBURGH 



A Manual, with full description 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. 



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