191 



Bosribes LituUcs Bickmoreanus from Niagara limestones at Wabash City, Ind. 



Whitley county, Geology of. R. Owen's Rep. 1859-60. 



Whittlesey, Chas. Notes on the drift and alluvium of Ohio and the 



West. A. J. S. (new series) vol. 5 pp. 205-217. 

 Williams, H. S. Rep. of the subcommittee on the upper paleozoic (De- 



vonic). Am. Geol. vol. 2 p. 232. 



Describes the Devonian areas of North America. 



Williams, Jesse L. Altitudes in Wayne county. E. T. Cox's Rep. 1876- 

 77-78. 



Winchell, A. Vegetable remains in the drift deposits of Indiana. A. 

 A. A. S. (Proceedings) vol. 24, B. Nat. Hist. p. 49, 1875. Vegetable de- 

 posits were noted in the counties of Franklin, Vermillion, Clay, Dubois, 

 Park, Ohio, Dearborn, Switzerland, Clarke, Warren and Knox. 



Winchell, N. The surface geology of Ohio. A. A. A. S. vol. 21, p. 152. 

 Surface deposits of Indiana are referred to, and a classification of such 

 deposits suggested and the various forms described. 



Wortman, J. L. (E. D. Cope.) Post-pliocene vertebrates of Ind. J. 

 Collett's Rep. 1884. 



Wright, G. F. The glacial boundary in Western Pennsylvania, Ken- 

 tucky, Indiana and Illinois. Bull No. 58, IT. S. G. S. 



^Man and the Glacial Period. (Published in book form.) 



Contains references to the work of Mr. Cresson, who discovered in Jackson county 

 " human works and remains under strata considered of glacial date, or in others 

 ascribed to preglacial time." See ''Some Recent Criticism.' Am. Geol. vol. XI, 

 p. JIO. 



Wyandotte Cave. E. T. Cox's Rep. 1872. 



Fauna of. (See E. D. Cope.) 



Young, A. H. Manual of Botany of Jefferson County. E. T. Cox's Rep. 

 1870. 



SUGGESTIONS FOB. THE BIOLOGICAL SURVEY. 

 By John M. Coulter. 



[Ar.STRACT.J 



In studying the flowering plants of any region, they are naturally divided 

 into two categories, namely, (1) those that are indigenous, and (2) those 

 that are introduced. Each one of these groups presents its own special 

 problems in addition to those which are common to both. In the modern 

 study of collected material it has become more and more evident that col- 

 lectors ought to be trained. It is not sufficient to merely collect specimens 



