﻿498 ACTINOPTERl r GII. 



posterior margin finely serrated. Scale-ornament consisting of 

 delicate, subparallcl stria?, oblique and gently sigmoidal, tending 

 to reticulation posteriorly, or replaced by a punctate area, especi- 

 ally above the diagonal between the two acute angles of the scales* 



This species is not clearly distinguished by the definition from 

 the adult E. robisoni, but it is stated by Traquair to be recognizable 

 " by the strongly marked and deeply cut ornament of its scales." 



Form. $ Loc. Calciferous {Sandstones : Midlothian and Fifeshire. 

 Carboniferous Limestone (Blackband Ironstone): Loanhead, near 

 Edinburgh. 



P. 1001. Scattered remains of fish, in counterpart; Calciferous 

 Sandstone, Burdiehouse, near Edinburgh. Eyerton Coll. 



P. 1001 a. A similar smaller specimen ; Burdiehouse. 



Egerton Coll. 



P. 4396. Portion of caudal region ; Burdiehouse. 



Enniskillen Coll. 



P. 4397. Imperfect caudal region ; Burntisland, Fifeshire. 



Enniskillen Coll. 



Elonichthys pulcherrimus, Traquair. 



1881. Elonichthys pulcherrimus, R. H. Traquair, Trans. Roy. Soc. 

 Edinb. vol. xxx. p. 24, pi. i. figs. 9-12. 



Type. Fish, wanting all fins except the dorsal ; Geological Survey 

 of Scotland, Edinburgh. 



A species of moderate size, attaining a length of not less than 

 0*15. Length of head with opercular apparatus equal to the 

 maximum depth of the trunk, contained about four and a half 

 times in the total leugth ; cranial roof-bones closely tuberculated, 

 facial bones ornamented with striae passing into tubercles on the 

 margin of the upper jaw. Fin-rays robust, longitudinally striated. 

 Scales of moderate size, those of the flank scarcely deeper than 

 broad ; all finely ornamented and with delicate posterior serrations. 

 Scale-ornament consisting of delicate transverse striae, more or less 

 oblique on the flank, and somewhat reticulated in the caudal region; 

 enlarged dorsal ridge-scales marked with regularly concentric stria?. 



Form. Sf Loc. Calciferous Sandstone (Cement-stone Group) : Esk- 

 dale, Dumfriesshire. 



P. 5119. Imperfect fish, exhibiting the dorsal fin and part of the 

 caudal. Purchased, 1886. 



