

Emst Mayr Library 

 MwMtim of Comperatlv* 7w*>ff/ 

 Harvard Uoh 



FOSSILS 



AND 



ROCK SPECIMENS 



We have what is undoubtedly the largest stock of fossils 

 and rocks for sale in America. These embrace both foreign 

 and American specimens, the latter representing all parts of our 



country. New York State is well represented. 



We will be pleased to quote prices either on individual spec- 

 imens, singly or in lots ; or on systematic collections from 

 the Upper Devonian or other horizons. 



Write for circular of models, by Prof. C. E. Beecher, 

 showing the Embryonic Stages, and Dorsal Valves with hinge 

 structure, septa, arm supports etc. of ten typical genera of Brach- 

 iopods; and model of a complete Trilobite ( Triarthrus bccki) 

 showing all the appendages. 



We also manufacture casts pf rare or exceptionally per- 

 fect fossils. 



Catalogue discriptive of our smaller systematic collect- 

 ions in all branches of natural history, save entomology and 

 botany, will be mailed gratis to teachers on request. 



WARD'S NATURAL SCIENCE ESTABLISHMENT, 



30 - 40 College Ave., Rochester, N. V 



