﻿388 CROSSOPTERYGII. 



It remains uncertain whether or not this is the immature form 

 of M. hibberti. 



Form. Sf Loc. Coal-Measures : Lanarkshire, Northumberland, 

 Yorkshire, Derbyshire, and Staffordshire. 



46811. Rostral portion of cranium ; English Coal-Measures. 



Cunnington Coll. 



P. 5138. Mandibular ramus, 0*011 in length; from shale accom- 

 panying Townley Seam, Wylam-on-Tyne. 



Presented by William Dinning, Esq., 1886. 



P. 828 b. Portion of similar mandibular ramus, noticed by Traquair, 

 loc. cit. 1890, p. 164 ; Leeds. Egerton Coll. 



P. 828 a, c, e. Fragment and two scales, the first labelled Diplo- 

 jpterus carbonarius by Agassiz ; Leeds. Egerton Coll. 



P. 3302. Fragments of head and scales ; Leeds. Enniskillen Coll. 



Species not represented in the Collection have also been partially 

 defined under the following names : — 



Megalichthys ciceronius : Ectosteorhacliis ciceronins, E. D. Cope, 



Proc. Amer. Phil. Soc. vol. xx. (1883), p. 628.— Permian ; 



Texas. [Imperfect cranium ; collection of Prof. E. D. 



Cope, Philadelphia.] 

 Megalichthys Icevis, R. H. Traquair, Proc. Roy. Soc. Edinb. vol. 



xvii. (1890), p. 391. — Calciferous Sandstone ; Straiton, 



near Edinburgh. [Imperfect fishes ; Edinburgh Museum.] 

 Megalichthys nitidus : Ectosteorhacliis nitidus, E. D. Cope, Proc. 



Amer. Phil. Soc. vol. xix. (1880), p. 56. — Permian ; Texas. 



[Head and abdominal region, the type of Ectosteorhacliis ; 



collection of Prof. E. D. Cope.] 



Detached scales indistinguishable from those of Megalichthys 

 hibberti have also been discovered in the Coal-Measures of Ohio 

 (J. S. Newberry, Rep. Geol. Surv. Ohio, vol. i. pt. ii. 1873, p. 343, 

 pi. xl. fig. 3) and Nova Scotia (Psammodus bretohensis, J. F. 

 Whiteaves, Canadian Naturalist, n. s., vol. x. 1881, p. 36). The 

 error involved in the latter determination has been pointed out to 

 the writer by Mr. J. F. Whiteaves, in the Museum of the Canadian 

 Geological Survey, Ottawa, where the type specimen is preserved. 



A doubtful scale from the Lower Permian of Kounova, Bohemia, 

 is also named Megalichthys nitens, A. Fritsch, Fauna der Gaskohle, 

 vol. ii. (1889), pi. lxxxviii. figs. 15, 16. 



