﻿HOLOrTYCHIIDiE. 327 



Holoptychius flemingi, Agassiz. 



[Plate XI. figs. 1 a-cl.-] 



1844. Holoptychius femingii, L. Agassiz, Poiss. Foss. V. G. R. p. 71, 



pi. xxii. fig. 1 (non p. 140, pi. xxxi. a. fig. 25). 

 1844. Holoptychius andersoni, L. Agassiz, ibid. p. 72, pi. xxii. fig. 3. 



[British Museum.] 

 1844. Platygnathus jamesoni, L. Agassiz, ibid. pp. 61, 77, pi. xxv. [Tail ; 



British Museum.] 

 1855. Holoptychius andersoni, F. M'Coy, Brit. Palaeoz. Foss. p. 594. 

 1859. Holoptychius andersoni and H. Jiemingii, J. Anderson, Dura Den, 



p. 57, pi. i. fig. 3, pi. vii., pi. viii. figs. 1, 2. 

 1859. Platygnathus jamesoni, J . Anderson, ibid. p. 56, pi. i. fig. 2. 

 1863. Holoptychius Jiemingii, R. Walker, Ann. Mag. Nat. Hist. [3] 



vol. xi. p. 73, pi. ii. (lettered Glyptolepis), woodc. figs. 1-4. 

 1863. Glyptolepis Jiemingii, H. Mitchell, Geologist, vol. vi. p. 43. 

 1863. Glyptolepis Jiemingii, J. Powrie, Geologist, vol. vi. p. 96. 

 1861. Glyptopomus, T. H. Huxley {errore), Figs, and Descrips. Brit. 



Organic Remains (Mem. Geol. Surv.), dec. x. p. 4, woodc. fig. 4. 

 1866. Glyptopomus, T. H. Huxley {errore), ibid. dec. xii. pi. i. fig. 2. 

 1888. Holoptychius Jiemingii, M. Lohest, Ann. Soc. Geol. Belg. vol. xv. 



p. 143, pi. iii. figs. 2, 4, pi. vi. fig. 1. 

 1888. Holoptychius Jiemingii, R. H. Traquair, Geol. Mag. [3] vol. v. 



p. 513. 

 1890. Holoptychius Jlemingi, Woodward & Sherborn, Cat. Brit. Foss. 



Vertebrata, p. 96. 

 1890. Holoptychius Jiemingii, R. H. Traquair, Proc. Roy. Soc. Edinb. 



vol. xvii. p. 388. 



Type. Group of scales. 



A species somewhat smaller than the type. Head and opercular 

 apparatus occupying nearly one-fifth of the total length ; first dorsal 

 fin relatively small ; second dorsal fin partly opposed to the space 

 between the anal and the caudal. Scales externally ornamented 

 with well-spaced delicate antero-posterior ridges, often bifurcating 

 and sometimes anastomosing anteriorly ; the ridges not interrupted, 

 except rarely upon the ventral aspect of the abdominal region, but 

 often continued upon the overlapped portion of the scale by short, 

 delicate, radiating lines of inconspicuous tubercles. 



Form, fy Loc. Upper Old Red Sandstone : Dura Den, Fifeshire. 

 Upper Devonian : Chevremont and Strud, Belgium. 



26117 b. Skull, mandible, and portion of the branchiostegal ap- 

 paratus, ascribed to Glyptopomus by Huxley, loc. cit. ; 

 Dura Den. The woodcut, exhibiting the upper aspect 

 one-half the natural size, is reproduced in the accompany- 

 ing fig. 49. Posteriorly is a broken median element 



