﻿ICHTHYODORULITES. 103 



Ctenacanthus compressus, J. S. Newberry, Ann. New York Acad. 



Sci. vol. i. (1878), p. 191, and Palseoz. Fishes N. America 



(Mon. U.S. Geol. Surv. no. xvi, 1889), p. 168, pi. xxiii. 



fig. 4. — Cleveland Shale (Lower Carboniferous); Lorain Co., 



Ohio. [Columbia College, New York.] 

 Ctenacanihus coccianus, St. John & Worthen, op. cit. vol. vii. 



p. 233, pi. xxi. fig. 1. — Keokuk Limestone ; Iowa. 

 Ctenacanihus crenatus. F. M'Coy, Brit. Palseoz. Foss. 1855, p. 624, 



pi. iii. i. fig. 31 : Ctenacanthns crenidatus, L. Agassiz, Poiss. 



Foss. vol. iii. (1843), p. 177 (name only) ; J. W. Davis, 



Trans. Eoy. Dublin Soc. [2] vol. i. (1883), p. 345, pi. xlv. 



fig. 6. — Lower Carboniferous Limestone ; Armagh, Ireland. 



[Woodwardian Museum, Cambridge.] 

 Ctenacanihus cylindricus, J. S. Newberry, Palaeoz. Fishes N. 



America (Mon. U.S. Geol. Surv. no. xvi. 1889), p. 202, 



pi. xxvi. fig. 1. — Keokuk Limestone Shale ; Casey Co., 



Kentucky. 

 Ctenacanthus deflexus, St. John & "Worthen, op. cit. vol. vii. 



p. 234, pi. xxii. fig. 1. — St. Louis Limestone; Illinois. 

 Ctenacanthus elegans, M. Tuomey, Geol. Alabama (1858), p. 38, 



woodcut fig. A. — Lower Carboniferous : North Alabama. 

 Ctenacanthus eoccavatus, St. John & Worthen, op. cit. vol. vi. 



p. 428, pi. xv. figs. 4, 5. — Keokuk Limestone ; Iowa and 



Missouri. 

 Ctenacanthus formosus, J. S. Newberry, Rep. Geol. Surv. Ohio, 



vol. i. pt. ii. (1873), p. 328, pi. xxxvi. fig. 2, and ibid. 



vol. ii. pt. ii. (1875), p. 53, pi. lix. fig. 1. — Waverly Group ; 



Ohio and Kentucky. [Columbia College, New York.] 

 Ctenacanthus fur cicarinatus, J. S. Newberry, op. cit. vol. ii.pt. ii. 



p. 54, pi. lix. fig. 2. — Waverly Group ; Kentucky. 



[Associated with teeth of Orodus variabilis.'] 

 Ctenacanthus gemmatus, St. John & Worthen, op. cit. vol. vi. 



p. 429, pi. xv. figs. 9, 10. — St. Louis Limestone ; Illinois. 

 Ctenacanthus gradocostus, St. John & Worthen, op. cit: vol. vi. 



p. 425, pi. xv. figs. 2, 3. — Upper Burlington Limestone ; 



Iowa and Illinois. 

 Ctenacanthus harrisoni, St. John & Worthen, op. cit. vol. vii. 



p. 236, pi. xxiii. fig. 1. — St. Louis Limestone; Illinois. 

 Ctenacanthus TceoJcuJc. St. John & Worthen, op. cit. vol. vi. p. 427, 



pi. xv. fig. 8. — Keokuk Limestone ; Illinois, Iowa, and 



Missouri. 

 Ctenacanthus littoni, J. S. Newberry, Palseoz. Fishes N. America 



(Mon. U.S. Geol. Surv. no. xvi. 1889), p. 201, pi. xxv. 



fig. 3. — St. Louis Limestone ; St. Louis, Missouri. 



