496 
ACTIXOPTEEYGII. 
1877. Elonichthys striolatus, R. H. Traquair, ibid, p. 553, and Ganoid 
Fishes Brit. Carb. Form. (Pal. Soc.), p. 57, pi. vii. figs. 4-15. 
1880. Elonichthys tmuiserratus, R. H. Traquair, Proc. Roy. Phys. 
Soc. Edinb. vol. y. p. 119. [Imperfect fish; Mus. Comp. Zool., 
Cambridge, Mass.] 
1880. Elonichthys dunsii, R. Tl. Traquair, ibid. p. 126. [Imperfect 
fish; Free Church College Museum, Edinburgh.] 
1890. Elonichthys nemopterus, R. H. Traquair, Proc. Roy. Soc. Edinb. 
vol. xvii. pp. 390, 394 (admits varieties striolatus, intermedius, 
dunsii , tenuiserratus, and affinis'). 
Type. Imperfect fish ; Edinburgh Museum. 
A very variable species, of moderate size. Maximum depth of 
trunk more than twice that of the caudal pedicle, and equalling 
nearly one quarter of the total length. Head with opercular appa¬ 
ratus contained about four and a half times in the total length; 
cranial roof-bones tuberculated, facial bones striated. Fin-rays 
robust, with close articulations in the adult, finely marked with 
longitudinal striae ; fulcra minute. Scales of flank scarcely deeper 
than broad; posterior margin finely serrated. Scale-ornament 
consisting of very delicate, irregular, oblique striae, passing behind 
into reticulations or punctations. 
Form. Sf Loc, Calciferous Sandstones: Midlothian and Fifeshire. 
Carboniferous Limestone : Midlothian l . 
V. 3428. Well-preserved specimen, 0145 in length, displaying the 
dorsal, anal, and parts of the other fins ; Calciferous Sand¬ 
stone, Burdiehouse, near Edinburgh. Enniskillen Coll. 
20685. Equally large specimen, much crushed and distorted, show¬ 
ing parts of the paired, anal, and caudal fins; Burdie¬ 
house. Purchased , 1847. 
P. 999. Three young individuals, one imperfect anteriorly ; Burdie¬ 
house. Eyerton Coll. 
P. 2827, P. 3432. Three young individuals, somewhat imperfect: 
Burdiehouse. Enniskillen Coll. 
P. 3429. Portions of three small individuals ; Burdiehouse. 
Enniskillen Coll. 
1 Under the name of Palceoniscvs striolatus, Ag., an uncertain species from 
the Coal-Measures of Lobejun, Province of Saxony, is also described by E. F. 
Germar, Yerstein. Steinkohlengeb. Wettin (1849), p. 79. pi. xxix. fig. 12. Another 
fossil, similarly described as having been obtained from Belgium (L. G. de 
Koninck, Anim. Foss. Terr. Carb. Belg. 1844, p. 610, pi. liv. figs. 1,2), is pro¬ 
bably a German specimen of Palcsoniscusmacropomus (R. H. Traquair, inL. G. 
de Xoninck’s Faune Calc. Carb. Belg. pt. i, p. 13). 
