﻿DIl'TRRID.B. 243 



Chemung Group of Ithaca, New York State, is named Dipterus 

 ithacensi?, H. S. Williams, Proo. Amer. Assoc. Adv. Sci. vol. xxx. 

 (1881), p. 193. 



Genus PALffiDAPHUS, P. J. Van Beneden & L. G. 



de Koninck. 



[Bull. Acad. Roy. Belg. [2] vol. xvii. 18(34, p. 150.] 



Syn. Heliodiis, J. S. Newberry, Rep. Geol. Surv. Ohio, vol. ii. pt. ii. 

 1875, p. 62. 



A provisional genus at present incapable of definition, comprising 

 very large Palaeozoic Dipnoan fishes, in which the anterior portion 

 of the mandible resembles in shape that of Dipterus. 



Palaedaphus insignis, Tan Beneden <fc de Koninck. 



1864. Palcedaphus insignis, P. J. Van Beneden & L. G. de Koninck, 



Bull. Acad. Roy. Belg. [2] vol. xvii. p. 143, pis. i., ii. 

 1871. Palcedaphus insignis, A. Giinther, Phil. Trans, p. 557. 

 1875. Palcedaphus insignis, J. S. Newberry, Rep. Geol. Surv. Ohio, 



vol. ii. pt. ii. p. 63. 

 1878. Palcedaphus insignis, R. H. Traquair, Ann. Mag. Nat. Hist. [5] 



vol. ii. p. 12, pi. iii. figs. 5-7. 

 1888. Palcedaphus insignis, A. Fritsch, Fauna der Gaskohle, vol. ii. 



p. 88, fig. 167. 



Type. Anterior half of mandible with dental plates ; Museum, 

 University of Liege. 



The type species. Mandibular dental plates attaining a length of 

 about 013, with four rounded, widely-spaced, coronal ridges, scarcely 

 radiating. 



Form. § Loc. Upper Devonian : Belgium. - 



43603. Plaster cast of type specimen, shown, one sixth nat. size, 

 in woodc. fig. 36 (4), p. 234 ; Huy. Purchased, 1872. 



Palaedaphus devoniensis, Van Beneden. 



1869. Palcedaphus devoniensis, P. J. Van Beneden, Bull. Acad. Roy. 



Belg. [2] vol. xxvii. p. 378, with plate. 

 1875. Heliodus devoniensis, J. S. Newberry, Rep. Geol. Surv. Ohio, 



vol. ii. pt. ii. p. 63. 

 1878. Palcedaphus devoniensis, R. II. Traquair, Ann. Mag. Nat. Hist. 



[5] vol. ii. p. 15. 

 1888. Pala'daphus devoniensis, A. Fritsch, Fauna der Gaskohle, vol. ii. 



p. 60, fig. 168. 



b2 



