PALiEONISCID ZE. 
491 
Elonichthys striatus (Agassiz). 
1835. Amblypterus striatus , L. Agassiz, Poiss. Foss. yol. ii. pt. i. p. Ill, 
pi. iv. b. figs. 3-6. 
1837. Amblypterus striatus, Paterson, Eclinb. New Phil. Journ. vol. 
xxiii. p. 153. 
1857. RhabdoUpis striatus, F. EL. Troscliel, Verliandl. naturh. Yerein. 
preuss. Itheinl. u. VYestphal. p. 16. 
1877. Cosmoptychius striatus, R. H. Traquair, Quart. Journ. Geol. Soc. 
vol. xxxiii. p. 553 j and Ganoid Fishes Brit. Garb. 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 fiank 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. Sf Loc. Caiciferous 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; AYardie, near Edinburgh. 
Egerton Sf EnnisTcillen 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. Palceoniscum macropterum, H. G. Bronn, Zeitsckr. 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. 
