204 



KANSAS UNIVERSITY QUARTERLY. 



Xiphactinus Leidy, a preliminary description 

 of the opercular and other cranial bones 

 of, viii, W. 



individual variations in thegenus, vii, 115. 

 Xiphactinus audax, vii, 119. 



brachygnathus, n. sp., viii, 107. 



molossus, vii, 115. 



thaumas, vii, 115, 

 Xylota analis, iii, 241. 



coloradensis, iii, 247. 



ejuncida, iii, 245. 



flavitibia, iii, 244; i, 38. 



Xylota metallifera, iii, 247. 



notha, iii, 247. 



pigra, iii, 247. 



Y. 

 Yellow helium line, note on, viii, 85. 

 Yoldia glabra, n. sp., viii, 133. 



Z. 



Zenochfetta, ii, 166. 



dichromata, ii, 166. 

 Zoospores of Algie, apparatus for the study of, 

 vii, 112. 



