JUL 8 1903 



No. / . — Carboniferous Fishes from the Central Western States. 



By C. Pi. Eastman. 



The present contribution embodies the results of investigations of an 

 extended series of Carboniferous fishes from the Mississippi and Missouri 

 Valley region, and is essentially a continuation of *' Some Carboniferous 

 Cestraciont and Acanthodian Sharks." ' With regard to fauna! re- 

 lations, the subject-matter of the following pages falls naturally into a 

 threefold division. Attention is first claimed by the Upper Carbo- 

 niferous fish-fauna of Kansas and Nebraska, which is one of great interest 

 palaeontologically and morphologically. The Coal Measure fish-fauna 

 of Mazon Creek, Illinois, is considered next, and the structure of 

 several new and little-known forms illustrated. Last in order of dis- 

 cussion are certain new or little-known species from the Missi.ssippian 

 series, which appear worthy of notice either on account of their mor- 

 phologic interest, or because of their relations to other well-known 

 forms. The greater part of the material upon which the following obser- 

 vations are based is preserved in the Museum of Comparative Zoology 

 at Cambridge, and so far as possible the location of types and figured 

 specimens is given under the caption of the several species, in the case 

 of all those belonging to other institutions. 



I. THE UPPER CARBOXIFEROUS FISH-FAUNA OF 

 KANSAS AND NEBRASKA. 



Altogether, about fifteen species of Upper Carboniferous fishes have 

 been described from Kansas and Nebraska in the writings of J. Leidy,^ 

 0. H. St. John," St. John and Worthen,* and S. W. Williston.^ To 



1 Bull. Mus. Comp. Zool., Vol. XXXIX., 1902, No. 3. 



2 Extinct Vert. Fauna Western Territ. Rept. U. S. Geol. Surv. Terrlt., Vol. I., 

 1873, pp. 311-313. 



3 Hayden's Final Rept. U. S. Geol. Surv. Nebraska, 1872, pp. 239-245. 

 * Palaeontology of Illinois, Vol. VI., 1875; ibid., Vol. VII., 1883. 



5 Kansas Univ. Quart., Vol. VIII., 1899, p 178. 



VOL XXXIX. — SO. 7 1 



