+ 
DISSECTING MICROSCOPES 
of every size, style and price, suited 
or all kinds of work. 
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A new series of lenses 
for dissecting work have 
recently been perfected by 
us which have unusually 
long working distance and 
mee large flat field. These 
Lens Holder for Anatomical Work. lenses are offered at 
prices less than any lenses of equal quality heretofore 
in use. The new Dissecting Stands are all nickeled 
metal with glass stage. 18” Catalog free. 
Sample copy JOURNAL OF APPLIED MICROSCOPY on request. 
ro PAUSCH & LOMB OPTICAL CO. 
= 
NEW YORK 0 : CHICAGO OFFICE : 
25th Street and Broadway, ROCHESTER, N. Y. State and Washington Streets, 
Townsend Bldg. Stewart Bldg. 
PUBLICATIONS OF THE UNIVERSITY OF PENNSYLVANIA 
SYLLABUS OF LECTURES ON THE 
VERTEBRATA. 
By the late Proressor E. D. COPE. 
With Introduction by HENRY FAIRFIELD OSBORN, Sc.D. 
8vo. Cloth, $1.25; paper, $1.00. 
BOSTON, GINN & COMPANY, AGENTS. 
IMPORTANT PERIODICAL PUBLICATIONS 
JOURNAL OF MORPHOLOGY. - 
Edited by C. O. WHITMAN, Head-Professor of Zoölogy, University of Chicago. 
: C 
rown 8vo. Three numbers a volume of 100 to 150 pages each, with from 
five to ten double lithographic plates. Subscription price, $9.00 per volume ; 
single copy, $350. || : aa 
ZOOLOGICAL BULLETIN. 
Under the editorial direction of Professors C. O. WHITMAN and W. M. WHEELER, 
assisted by a number of collaborators. Subscription price, $3.00 per volume 
six numbers ; single numbers, 75 cents each. : 
GINN & COMPANY, PUBLISHERS, 
9-13 TREMONT PLACE, BOSTON. 
