452 
ACTIN0PTERYGI1. 
Cheirolepis trailli, Agassiz. 
1828. 1 Second Ganirie Ichthyolite,’ Pentland, Trans. Geol. Soc. [2] 
yoI. ii. p. 364. 
1835. Cheirolepis traillii, L. Agassiz, Poiss. Foss. vol. ii. pt. i. p. 130, 
pi. i. d , pi. i. e. fig. 4. 
1835. Cheirolepis uragus, L. Agassiz, ibid. p. 132, pi. i.e. figs. If3 l . ^ 
1844. Cheirolepis cummingice, L. Agassiz, ibid. p. 301 (name only). 
1844. Cheirolepis cummingice, ~L. Agassiz, Poiss. Foss. Y. G. It. p. 45, 
pl.xii. [Forres Museum.] 
1848. Chirolepis curtus , F. M‘Coy, Ann. Mag. Nat. Hist. [2] vol. ii. 
p. 302. [Woodwardiau Museum.] 
1848. Chirolepis mcicrocephalus, F. MPov, ibicl. p. 303. [Ibid.] 
1848. Chirolepis velox, F. M‘Coy, ibid. p. 302. [Ibid.] 
1855. Chirolepis traillii, F. M‘Coy, Brit. Palseoz. Foss. p. 581. 
1855. Chirolepis uragus, F. M‘Coy, ibid. p. 581. 
1855. Chirolepis curtus, F. M‘Coy, ibid. p. 580, pi. ii.D. fig. 1. 
1855. Chirolepis mcicrocephalus, F. M‘Coy, ibid. p. 580, pi. ii. d. fig. 3. 
1855. Chirolepis velox, F. M‘Coy, ibid. p. 581, pi. ii. D. fig. 2. 
1860. Chirolepis curtus= C. cummingice, Sir P. Egerton, Quart. Journ. 
Geol. Soc. vol. xvi. p. 123. 
1860. Chirolepis macrocephalus == C. trailli, Sir P. Egerton, ibid. p. 123. 
1867. Cheirolepis trailli, J. Powrie, Geol. Mag. vol. iv. p. 152. 
1867. Cheirolepis cummingice, J. Powrie, ibid. p. 152. 
1867. Cheirolepis uragus , J. Powrie, ibid. p. 152. 
1875. Cheirolepis cummingice, K. H. Traquair, Ann. Mag. Nat. Hist. [4] 
vol. xv. p. 240, pi. xvii. 
1888. Cheirolepis trailli, It. H. Traquair, Geol. Mag. [3] vol. v. p. 517. 
1890. Cheirolepis trailli, It. H. Traquair, Ann. Mag. Nat. Hist. [6] 
vol. vi. p. 485. 
Type. Imperfect fishes ; olim T. S. Traill Collection. 
The type species, attaining a length of about 0*35. Maximum 
depth of trunk contained about five and a half times in the total 
length. Head slightly longer than deep, the head with opercular 
apparatus occupying one-fifth of the total length : facial and oper¬ 
cular bones coarsely striated, the striae on the circumorbitals 
radiating, those on the expansion of the maxilla chiefly horizontal, 
though somewhat reticulated behind, and those of the operculum 
obliquely directed downwards and backwards. Pelvic fins relatively 
low and small, arising somewhat nearer to the anal than to the 
pectorals; dorsal and anal fins equally elevated, the former about 
two-thirds as long as the latter, and arising slightly behind the 
origin of this fin ; all the larger joints of the fin-rays sculptured 
1 Under this name fragments from near Pawlowsk, Govt, of St. Petersburg, 
are described by E. von Eichwald, Letfi. Rossica, vol. i. (1860), p. 1575, pi. lvii. 
fig. 21. 
