﻿HOLOrTYCHIID^. 



337 



P. 545. Imperfect right mandibular ramus, inner aspect, forming 

 the type specimen described and figured by Agassiz, 

 loc. cit. ; Orkney. Egerton Coll. 



P. 182. Imperfectly preserved head and trunk of a somewhat 

 smaller individual, ventral aspect, in counterpart ; Caith- 

 ness. The ornamentation of the scales is especially well 

 shown. Purchased, 1881. 



P. 5934. A somewhat larger individual, ventral aspect, with 

 portions of the median fins, but exhibiting only the inner 

 surface of the scales ; Achanarras, Caithness. 



Purchased, 1889. 



33169. Fragment of squamation ; Thurso. Purchased, 1857. 



42401. Scale, abraded, but showing ornamentation; Castlehill, 

 Caithness. Peach Coll. 



Detached scales, not represented in the Collection, are also named 

 thus : — 



Glyptolepis benedeni, M. Lohest, Ann. Soc. Geol. Belg. vol. xv. 

 (1888), p. 150, pi. ix. figs. 3-5, pi. x. figs. 1, 2.— Upper 

 Devonian ; Belgium. [M. Lohest Collection, Liege.] 



Glyptolepis radians, M. Lohest, ibid. p. 151, pl.ix. figs. 1, 2. — 

 Upper Devonian ; Belgium. [M. Lohest Collection.] 



The supposed species, named as follows, are founded upon doubtful 

 fragmentary evidence : — 



Glyptolepis orbis, E. von Eichwald, Bull. Soc. Imp. Nat. Moscou, 

 vol. xvii. (1844), p. 832, and Leth.Eossica, vol. i. (1860), 

 p. 1568, pi. lvi. fig. 6, pi. lvii. fig. 22.— Devonian ; N.W. 

 Eussia. [Fragment of jaw and scales ; University of 

 St. Petersburg.] 



Glyptolepis quadrata, E. von Eichwald, ibid. (1844), p. 832, and 

 ibid. (1860), p. 1569. — Devonian ; Marjina, E. Slawjanka. 

 [Scales ; University of St. Petersburg.] 



Sclerolepis decorata, E. von Eichwald, ibid. (1844), p. 828, and 

 vol. xix. (1846), pt. ii. p. 299, pi. x. figs. 16, 17, and 

 Leth. Eossica, vol. i. (1860), p. 1570, pi. lvii. fig. 7.— Devo- 

 nian ; Marjina. [Scales in University of St. Petersburg, 

 assigned to Glyptolepis by C. H. Pander, Saurodipt., Den- 

 drodont. &c. devon. Syst. (1860), p. 63.] 



The detached large teeth of the Dendrodont Crossopterygians 

 paet n. z 



