PLATYSOMATIIUE. 
531 
P. 3505. Large crushed fish, in counterpart, wanting the greater 
portion of the head and fins, but with well-preserved 
scales; Carboniferous Limestone (Edge-Coal Series), Wally- 
ford, near Edinburgh. Enniskillen Coll. 
P. 977 a. Type specimen of Platysomus declivus, Agassiz, being an 
imperfect small trunk wanting the tail and the greater 
part of the head: Calciferous Sandstone, Burntisland, 
Eifeshire. Eger ton Coll. 
P. 3506. Imperfect trunk, in counterpart; Carboniferous Lime¬ 
stone, Gilmerton, near Edinburgh. Enniskillen Coll. 
P. 4620. Bemains of fish showing pectoral fin; probably from the 
Carboniferous Limestone Series near Edinburgh. 
Enniskillen Coll. 
P. 3478. Type specimen of Plectrolepis rugosa , Agassiz, as deter¬ 
mined by Egerton. Enniskillen Coll. 
The following species have also been named, but there are no 
examples in the Collection :— 
Eurynotus (?) aprion, B. H. Traquair, Trans. Boy. Soc. Edinb. 
vol. xxx. (1881), p. 54, pi. v. fig. 20.—Calciferous Sand¬ 
stone (Cement-stone Group); Tweeden Burn, Dumfries¬ 
shire. Lower Carboniferous; Moyheeland, Ireland. 
[Scales ; Geological Survey of Scotland.] 
Eurynotus insignis, B. H. Traquair, ibid. vol. xxix. (1879), p. 349 : 
Platysomus (?) insignis , L. G. de Boninck, Eaune Calc. 
Carb. Belg. pt. i. (1878), p. 25, pi. iii. figs. 1, 2.—Carbo¬ 
niferous Limestone; Yiesville, Belgium. [Imperfect head 
and abdominal region; Boyal Museum, Brussels.] 
Eurynotus microlepidotus , B. H. Traquair, Proc. Boy. Soc. Edinb. 
vol. xvii. (1890), p. 400.—Middle Carboniferous Lime¬ 
stone ; Loanhead, near Edinburgh. [Collection of Dr. B. H. 
Traquair.] 
The so-called Eurynotus tenuiceps, Ag., is a species of iSemionotus 
(see Part III.). 
Genus MESOLEPIS, A'oung. 
[Quart. Journ. Geol. Soc. vol. xxii. 1866, p. 313.] 
Syn. Pododus, L. Agassiz, Poiss. Loss. vol. ii. pt. ii. 1844, p. 83 (name 
only). \ 
Trunk very deeply fusiform, the dorsal contour more or less angu- 
lated at the origin of the dorsal fin. Erontal profile of head sharply 
angulated immediately in advance of the orbit; head and opercular 
2m 2 
