vi ADVERTISEMENTS. 
The Entomologist’s Record and Journal of Variation 
Edited by J. W. TUTT, F. E. S., London, England. 
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This is now the acknowledged leading scientific entomological Magazine 
in Britain, and contains all the most recent views of writers in Entomological 
science all over the world. The monthly summaries of work done in different 
countries make this a ready means for every scientific worker to keep himself 
au fait with the advance of science. The advance of Philosophical and 
Biological questions relating to insects is made a special feature as is also the 
causes of their variation. 
Monthly critiques of the articles in the leading German and American 
entomological magazines. A monthly summary of the scientific progress made 
by the Societies. Current notes on entomological science from all parts of the 
world. Practical Hints for collectors, as to breeding, capturing and preserving 
insects. 
Subseriptions for the current volume 7p, should be sent by all scientific 
entomologists and students to 
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PLASTER CASTS OF THE FOLLOWING MAMMALIA 
with dentition in good preservation, made under direction of 
Professor E. D. Cope may be had by application to Jacob 
Geisman, 2102 Pine St., Philadelphia. 
Phenacodus primaevus Cope, (Wyoming) $100.00.  Ay- 
vacotherium venticolum Cope, (Wyoming) $50.00. Protohippus 
micabilis Leidy, skull $7.00. Protohippus pachyops Cope, skulls 
of adult and young, and P. fossulatus Cope, skull, $5.00 each. 
Tetrabelodon shepardii Leidy, mandibular ramus and symphysis 
with two molars, $20.00. - Dzdelodon tropicus Cope, do., $15.00; 
| Mastodon precursor Cope, last. molar $5.00. The horses and 
—*aastodons from the Cenozoic beds of Texas, are uncolored. 
