﻿452 ACTINOPTERYGll. 



Cheirolepis trailli, Agassiz. 



1828. ' Second Garnrie Ichthyolite,' Pentland, Trans. Geol. Soc. [2] 



vol. 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. 1-3 l . 

 1844. Cheirolejns cummingice y L. Agassiz, ibid. p. 301 (name only). 

 1844. Cheirolepis cummingice, L. Agassiz, Poiss. Foss. V. G\ R. p. 45, 



pi. xii. [Forres Museum.] 

 1848. Chirolepis curtus, F. M'Coy, Ann. Mag. Nat. Hist. [2] vol. ii. 



p. 302. [Woodwardian Museum.] 

 1848. Chirolepis macrocep>halus, F. M'Coy, ibid. p. 303. [Ibid.] 

 1848. Chirolepis velox, F. M'Coy, ibid. p. 302. [Ibid.] 

 1855. Chirolepis traillii, F. M'Coy, Brit. Palaeoz. 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 macrocephalus, 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^ R. H. Traquair, Ann. Mag. Nat. Hist. [4] 



vol. xv. p. 240, pi. xvii. 

 1888. Cheirolepis trailli, R. H. Traquair, Geol. Mag. [3] vol. v. p. 517. 

 1890. Cheirolepis trailli, R. 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, Letb. Eossica, vol. i. (1860), p. 1575, pi. lvii. 

 fig. 21. 



