﻿CCEL0LEPID2E. 



is: 



Phlebolepis elegans, Pander, ibid. p. 60, pi. v. fig. 12. 



Prionocanthus dubia, Pander, ibid. p. 70, pi. xxi. fig. 21. 



Rytidolepis quenstedti, Pander, ibid. p. 48, pi. v. fig. 2. 



Schidiosteus mustelensis, Pander, ibid. p. 49, pi. v. fig. 13. 



Stigmolepis oiveni, Pander, ibid. p. 53, pi. v. fig. 7. 



Trachylepis formosa, Pander, ibid. p. 52, pi. vi. fig. 22. 



The specimens described as Coccopeltus,Cyphomalepis, Trachylepis, 

 and Phlebolepis are regarded as probably referable to Eurypterids 

 by E. von Eichwald, Leth. Kossica, vol. i. (1860), p. 1502. 



Here may also be placed the indeterminable fragments of dermal 

 armour described under the following names : — 



Chiastolepis clathrata, E. von Eichwald, Bull. Soc. Imp. Nat. 

 Moscou, vol. xvii. (1844), p. 831, and ibid. vol. xix. 

 (1846), pt. ii. p. 301, pi. x. figs. 18, 19, and Leth. Rossica, 

 vol. i. (1860), p. 1565, pi. Ivii. fig. 11.— Devonian ; 

 Pawlowsk, St. Petersburg. [University of St. Peters- 

 burg.] 



Spirodus regularis, G. Kade, Programm k. Realsehule zu Meseritz, 

 ] 858, p. 20, fig. 13. — Lower Palaeozoic Boulder ; Silesia. 



Osteoplaoc erosa, F. M'Coy, Ann. Mag. Nat. Hist. [2] vol. ii. 

 (1848), p. 6, and Brit. Palseoz. Foss. (1855), p. 613, 

 pi. iii. k. fig. 12. — Carboniferous ; Cultra, Co. Down, Ireland. 

 [Woodwardian Museum, Cambridge.] 



Sp>henophorus lilleyi, J. S. Newberry, Palseoz. Fishes N. America 

 (Mon. U.S. Geol. Surv. no. xvi. 1889), p. 92, pi. xx. 

 fig. 15. — Chemung Group ; Bradford Co., Pennsylvania. 

 [Columbia College, New York.] 



Callognaihus regularis, J. S. Newberry, ibid. p. 70, pi. xxvii. 

 fig. 18. — Huron Shale ; Delaware, Ohio. [Columbia 

 College, New York.] 



Callognaihus serratus, J. S. Newberry, ibid. p. 70, pi. xxvii. 

 figs. 16, 17. — Cleveland Shale j Lorain Co., Ohio. [Co- 

 lumbia College, New York.] 



Family CCELOLEPIDJE. 



Under the group of ' Coelolepiden ' Pander arranges a number of 

 minute dermal tubercles, coated with ganoine, usually hollow within, 

 and having the external layer separated by a constriction from the 

 base. These tubercles consist of cosmine, and the relative size of 

 the internal cavity varies considerably, sometimes indeed appearing 

 to be absent. 



