OSTEOLEPID^E. 
387 
Edinb. vol. viii. p. 67, pi. iv., and Geol. Mag. [3] vol. i. p. 115, pi. y. 
tigs. 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 Loc. Calciferous Sandstones : Burdiehouse, 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 
liibberti 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. Enniskillen 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 pygmceus , 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. X. 
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. 
2c 2 
