506 
ACT1XOPTERTGII. 
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 ; Biechelsdorf, 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; 
Biechelsdorf. 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. 
Enniskillen 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. 
Enniskillen 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. Holopty chius hopkinsii, F. M‘Coy, Ann. Mag. Nat. Hist. [2] 
vol. ii. p. 2. 
1855. Acrolepis hopkinsii, F. M'Cojq Brit. Paloeoz. Foss. p. 609, 
pi. iii. a. fig. 10. 
1877. Acrolepis hopkinsii, B. H. Traquair, Quart. Journ. Geol. Soc. 
vol. xxxiii. p. 571. 
1877. Acrolepis rankinei, B. 11. Traquair, ibid. p. 571. [Imperfect 
fish ; collection of Dr. J. B. S. Hunter, Braidwood.] 
1890. Acrolepis hopkinsi, B. H. Traquair, Proc. Boy. Soc. Edinb. 
vol. xvii. p. 398. 
Type. Scales ; AYoodwardian 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- 
