﻿OSTEOLEPID^i. 387 



Edinb. vol. viii. p. 67, pi. iv., and Geol. Mag. [3] vol. i. p. 115, pi. v. 

 figs. 1-6. 

 1890. Megalichthys laticeps, R. H. Traquair, Proc. Roy. Soc. Edinb. 

 vol. xvii. p. 389. 



Type. Portions of fishes ; Edinburgh Museum. 



A comparatively small species. Parietal region of cranium broad, 

 shorter than the fronto-ethmoidal region ; length of maxilla more 

 than four times as great as the depth of its posterior expansion ; 

 mandible more than four times as long as deep ; each of the pair of 

 jugular plates about two and a half times as long as broad, abruptly 

 truncated posteriorly. Pelvic fins situated far behind the middle of 

 the body. Ganoine smooth and uniformly punctate. 



Form. Sf Log. Calciferous Sandstones : Burdiehotise, near Edin- 

 burgh, and Burntisland, Fifeshire. 



All the following specimens were obtained from the Burdiehouse 

 Limestone. 



P. 733-4. A series of fragments of fishes, one labelled Megalichthys 

 hibberti in Agassiz's handwriting, and some showing well- 

 preserved fins. Egerton Coll. 



37380. Portion of right mandibular ramus showing dental tubercles 

 on the splenial bone. Purchased, 1863. 



14058, 15537. Scales. Purchased. 



47720. Group of scales. Presented by Dr. Lauder Lindsay, 1876. 



P. 4470. Two groups of scales, one labelled Megalichthys hibberti in 

 Agassiz's handwriting. Ennishillen Coll. 



Megalichthys pygmseus, Traquair. 



1841. Megalichthys hibberti (" young "), E. W. Binney, Trans. Man- 

 chester Geol. Soc. vol. i. p. 163, pi. v. figs. 1, 2. 



1844. Diplopterus carbonarius, L. Agassiz, Poiss. Foss. vol. ii. pt. ii. 

 p. 162 (name only). [Scales, &c. ; British Museum.] 



1879. Megalichthys pygmesus, R. H. Traquair, Mem. Geol. Surv. Scot- 

 land, Expl. to Sheet 31 ; p. 76 (name only). 



1890. Megalichthys pygmceus, R. H. Traquair, in J. Ward, Trans. N. 

 Staffs. Inst. Mining Engin. vol. x. p. 164, pi. vi. figs. 7, 8. 



Type. Mandibular ramus ; Geological Survey of Scotland. 



An imperfectly known species of very small size. Mandible three 

 and a half times as long as deep; each of the pair of jugular plates 

 also three and a half times as long as broad, pointed in front, 

 rounded behind. Scales relatively thick, coarsely punctate. 



2c2 



