388 
CROSSOPTERYGII. 
It remains uncertain whether or not this is the immature form 
of M. hibberti. 
Form. Sf Log. 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. Eragment and two scales, the first labelled Diplo- 
pterus carbonarius by Agassiz ; Leeds. Egerton Coll. 
P. 3302. Eragments of head and scales; Leeds. Enniskillen Coll. 
a-J 
Species not represented in the Collection have also been partially 
defined under the following names :— 
Megalichthys ciceronius : Ectosteorhachis ciceronius, 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. 394.—Calciferous Sandstone ; Straiton, 
near Edinburgh. [Imperfect fishes ; Edinburgh Museum.] 
Megalichthys nitidus : Ectosteorhachis niticlus , E. D. Cope, Proc. 
Amer. Phil. Soc. vol. xix. (1880), p. 56.—Permian; Texas. 
[Head and abdominal region, the type of Ectosteorhachis ; 
collection of Prof. E.,D. Cope.] 
j f'fUnuM fc<£ I? i<t|. 
Detached scales indistinguishable from tnose of Megalichthi/s 
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 bretonensis , I. E. 
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. Eritsch, Fauna der Gaskohle, 
vol. ii. (1889), pi. lxxxviii. figs. 15, 16. 
