﻿132 ICHTHYODORfLITES. 



Physonemus gcmmatus: Drepanacanthus gcmmatus, Newberry & 



Worthen, Pal. Illinois, vol. ii. (1866), p. 123, pi. xiii. 



fig. 1. — Keokuk Limestone; Iowa. 

 Physonemus giganteus: Xystracanthus giganteus, W. Waagen, 



Salt-Range Fossils (Palaeonfc. Indica, ser. 13), vol. i. 



(18S0), p. 76, pi. vii. fig. 2. — Productus-Limestone ; 



Salt Range, Punjab, India. 

 Physonemus gig as, Newberry & Worthen, op. cit. vol. iv. (1870), 



p. 373, pi. ii. fig. 1. — Burlington Limestone, Illinois. 

 Physonemus JconincJci: Xystracanthus honinclci, M. Lohest, Ann. 



Soc. Geol. Belg. vol.xi. (1883), p. 322, pi. v. figs. 2, 3.— 



Lower Carboniferous (Ampelite) ; Belgium. 

 Physonemus mirabilis: Xystracanthus miralih's, St. John & Wor- 

 then, Pal. Illinois, toI. vi. p. 458, pi. xx. fig. 1. — Coal- 



Measures; Illinois. 

 Physonemus parvulus, St. John & Worthen, op. cit. vol. vi. p. 453, 



pi. xviii. figs. 11, 12. — Keokuk Limestone ; Missouri and 



Illinois. 

 Physonemus proclivus, St. John & Worthen, op. cit. vol. vi. p. 451, 



pi. xviii. figs. 1, 2. — Kinderhook Limestone; Illinois. 

 Physonemus reversus : Drepanacanthus reversus, St. John & Wor- 

 then, op. cit. vol. vi. p. 456, pi. xix. figs. 5, 6, and vol. vii. 



p. 253, pi. xxiv. fig. 5. — Upper St. Louis Limestone ; 



Illinois and Missouri. 

 Physonemus stellatus, J. S. Newberry, Palaeoz. Fishes N. America 



(Mon. U.S. Geol. Surv. no. xvi. 1889), p. 200, pi. xxi. 



fig. 12. — St. Louis Limestone ; Greencastle, Indiana. 



[Columbia College, New York.] 



Two fragments of spines, doubtfully of this genus, from the Pro- 

 ductus-Limestone of the Salt Range, Punjab, are named Xystra- 

 canthus gracilis, W. Waagen (torn. cit. 1879, p. 19, pi. i. figs. 2, 5), 

 and X. major, W. Waagen (ibid. p. 19, pi. ii. fig. 9). 



The so-called Physonemus subteres, from the Lower Carboniferous 

 Limestone of Armagh, named by Agassiz (Poiss. Foss. vol. iii. 1843, 

 p. 176), and described by F. M'Coy (Brit, Palaaoz. Foss. 1855, 

 p. 638, pi. iii. i. fig. 30) and J. W. Davis (Trans. Roy. Dublin Soc. 

 [2] vol. i. 1883, p. 368, pi. xlvii. fig. 12), does not appear to belong 

 to this genus ; and a very doubtful fossil from the Carboniferous 

 Limestone of Moscow is named Drepanacanthus pectmifer, U. Traut- 

 schold, Nouv. Mem. Soc. Imp. Nat. Moscou, vol. xiii. (1874), p. 297, 

 pi. xxviii. fig. 10. 



The fragments of spines, from the Lower Carboniferous of the 

 United States, named Batacanthus, St. John & Worthen (op. cit. 



