﻿506 ACTlNOrTERTGn. 



elements ; Eisleben, Province of Saxony. Some of the 

 scales and their ornamentation are well displayed. 



38588. Bones of the head associated with the imperfect caudal 

 region ; Riechelsdorf, Hesse. Impressions of the maxilla 

 and mandible are distinct, and the ornament of several of 

 the other bones is well shown. Purchased, 1864. 



P. 837. Two imperfect examples of the head, one connected with 

 part of the abdominal region and the pectoral fin; 

 Eiechelsdorf. Egerton Coll. 



P. 3410. Much abraded remains of head and trunk ; Mansfeld, 

 Thuringia. There is a large median scale in the anal 

 region, obtusely pointed in front, with a narrow, smooth 

 area anteriorly, but ornamented on the greater portion 

 of its external surface as the principal scales of the flank. 



EnnisJcillen Coll. 



P. 848. Greater portion of trunk with dorsal, anal, and pelvic fins, 

 all displaying the characteristic ornamentation ; Eisleben. 



Egerton Coll. 



P. 3410 a. Portion of large trunk and dorsal and anal fins ; Eisleben. 



EnnisJcillen Coll. 



P. 5141. Group of scales ; Marl Slate, Midderidge, Durham. 



Presented by William Dinning, Esq., 1886. 



Acrolepis hopkinsi, M'Coy. 



1844. Gyrolepis rankinei, L. Agassiz, Poiss. Foss. vol. ii. pt. i. p. 303 



(name only). 

 1844. JSoloptychius hopkinsii, F. M'Coy, Ann. Mag. Nat. Hist. [2] 



vol. ii. p. 2. 

 1855. Acrolepis hopkinsii, F. M'Coy, Brit. Palaeoz. Foss. p. 609, 



pi. iii. o. fig. 10. 

 1877. Acrolepis hopkinsii, R. H. Traquair, Quart. Journ. Geol. Soc. 



vol. xxxiii. p. 571. 

 1877. Acrolepis rankinei, R. H. Traquair, ibid. p. 571. [Imperfect 



fish ; collection of Dr. J. R. S. Hunter, Braidwood.] 

 1890. Acrolepis hopkinsi, R. H. Traquair, Proc. Roy. Soc. Edinb. 



vol. xvii. p. 398. 



Type. Scales ; Woodwardian Museum, Cambridge. 



Scales relatively larger than in the known Permian species, and 

 finely ornamented ; superficial ridges of principal flank-scales pro- 

 minent though small (about five to the space of 0*035), oblique, occa- 



