﻿PAL^ONISCIDZE. 491 



Elonichthys striatus (Agassiz). 



1835. Amblypterus striatus, L. Agassiz, Poiss. Foss. vol. ii. pt. i. p. 11], 



pi. iv. b. figs. 3-6. 

 1837. Amblypterus striatus, Paterson, Edinb. New Phil. Journ. vol. 



xxiii. p. 153. 

 1857. Rhabdole2ois striatus, F. H. Troschel, Verhandl. naturh. Verein. 



preuss. Rlieinl. u. VVestphal. p. 16. 

 1877. Cosmoptychius striatus, R. H. Traquair, Quart. Journ. Geol. Soc. 



vol. xxxiii. p. 553 ; and Ganoid Fishes Brit. Carb. Form. (Pal. 



Soc), p. 43, pi. ii. fig. 7, pi. iii. figs. 1-8. 

 1890. Elonichthys striatus, R. H. Traquair, Proc. Roy. Soc. Edinb. 



vol. xvii. pp. 390, 396. 



Type. Portions of fishes ; Edinburgh Museum. 



A species attaining a length of about 0*3. Maximum depth of 

 trunk in advance of dorsal fin contained somewhat less than four 

 times in the total length. Head with opercular apparatus occupying 

 about one-fifth of the total length; operculum very deep and 

 narrow; all the external bones delicately striated. Fin-rays 

 obliquely striated; dorsal and anal fins equal in size and form. 

 Scales of the middle of the flank nearly twice as deep as broad ; 

 none posteriorly serrated. Scale-ornament consisting of fine, 

 irregular, oblique striae. 



This is the type species of the so-called Cosmoptychius. 



Form. <$f Loc. Calciferous Sandstones : S.E. Scotland. 



P. 1012, P. 3446. A small nodule with part of squamation, and two 

 portions of nodules with scattered scales and an imperfect 

 head ; Wardie, near Edinburgh. 



Egerton Sf EnnisJcillen Colls. 



47719. Imperfectly preserved head, opercular apparatus, anterior 

 portion of the abdominal region, and paired fins ; Burdie- 

 house, near Edinburgh. A few of the large slender teeth 

 are observed in the front of the mandible, and the scale- 

 ornament is well exhibited. 



Presented by Dr. Lauder Lindsay, 1876. 



P. 846 b. Group of scales ; Burntisland, Fifeshire. Egerton Coll. 



Elonichthys macropterus (Bronn). 



1829. Talceoniscum macropterum, H. G. Bronn, Zeitschr. f. Mineral. 



vol. ii. p. 483. 

 1833. Amblypterus macropterus, L. Agassiz, Poiss. Foss. vol. ii. pt. i. 



pp. 4, 31, pi. i. figs. 4-7, pi. iii. figs. 1-4. 



