278 



'95. The influence of the environment on the early stages of embryonic 

 development. Science, I, 36. 



Wilson, W. P., 04. The influence of external conditions on i)lant life. 

 Biological Lectures, 1803, pp. 163-185. Boston, 1804. 



WiNDLE, B. C, '89. Report on a discussion on the transmission of acquired 

 characters. Nature, XL, 609. 



'89a. A note on the iiuisculus sternalis. Anat. Anz., IV, pp. 715-719. 



'90. On some cranial and dental characters of the domestic dog. Proc. Zool. 

 Soc , Jan. 1890. 



'90a. Terra tological evidence as to the heredity of acquired conditions. 

 J. Linn. Soc. Zool., XXIII, pp. 448-502. 



WoRTMAN, J. L., '93. A new theory of the mechanical evolution of the 

 metapodial keels of Diplarthra. Am. Nat., XXVII, p. 421. 



Zenneck, J., '94. Die Anlage der Zeichnung u. deren physiologische 

 Ursachen bei Eingelnatterembryonen. Zeitscli. W. Zool., LVIII, pp. 364-393. 



VARIATION OF NORTH AMERICAN FISHES. II. 



The Variation op^ Etheostoma Caprodes Rafinesque in Turkey Lake 

 AND Tippecanoe Lake.* By W. J. Moenkhaus. 



Introduction. — In a former paper on the "Variation of EtheoMoma caprodes 

 Raflne8(iue" (Am. Nat., Aug., 1894), I determined the geographical distribution 

 of this fish and the geographical variation of its color-pattern and fins. 



It was found that this species inhabits practically all the fresh waters of the 

 Atlantic slope east of the 100th meridian and west of the Alleghany Mountains. 

 Its northern and eastern limits are the Great Lakes and Lake Champlain ; its 

 southwestern, the Rio Grande in the extreme southern part of Texas. 



The following conclusions were reached among others : 



1. Each river system from which specimens w'ere examined possesses a pe- 

 culiar variety. This peculiarity is most striking in the color-pattern. 



2. All the variations are continuous. 



'■''Contributions from the Zoologicnl Laboratory of the Indiana University under the 

 direction of C. H. Eigeninann, Ko. 18. 



