444 
ACTTXOPTERYGII. 
tions, those immediately behind the pectoral arch also marked 'with 
short oblique striae terminating in the serrations. 
Form. df Log. Lower Permian : Autun, France. 
P. 3418. Type specimen. Enniskillen Coll. 
P. 3419. Well-preserved small trunk, with fins, noticed by Egerton, 
loc. cit. Enniskillen Coll. 
P. 986, P. 3417. Partially scattered remains of large trunk and 
median fins, in counterpart. Egerton § Enniskillen Colls. 
P. 3417 a. Smaller imperfect trunk and fins. Enniskillen Coll. 
Amblypterus decorus (Egerton). 
1850. Palceoniscus decorus, Sir P. Egerton, Quart. Journ. Geol. Soc. 
vol. vi. p. 7, pi. ii. 
1877. Amblypterus decorus , R. H. Traquair, ibid. vol. xxxiii. p. 558. 
Type. Fish with imperfect head; British Museum. 
A large species, attaining a length of not less than 0*25. Form 
and proportions of head, trunk, and fins as in A. beciumonti: ex¬ 
ternal bones similarly ornamented with vermiculating rug?e. Scales 
all smooth, without posterior serrations, except feeble traces in the 
anterior ventro-lateral region : principal scales of flank scarcely 
deeper than broad. 
Form. Loc. Coal-Measures : Commentry, Allier, France ; Harz 
Mts. 
P. 607, P. 3420. Type specimen, being a fish wanting the greater 
portion of the caudal region, but completely shown in the 
counterpart impression ; Commentry. 
Egerton <$f Enniskillen Colls, 
28293. Dorsal half of abdominal region and the caudal pedicle; 
Commentry. Purchased, 1851. 
P. 3422. Imperfectly preserved fish wanting the extremity of the 
tail, compared with this species by Egerton, loc. cit. p. 7 : 
Ilfeld, Harz. Enniskillen Coll. 
Amblypterus arcuatus (Egerton). 
1850. Palceoniscus arcuatus, Sir P. Egerton, Quart. Journ. Geol. Soc. 
vol. vi. p. 7, pi. i. fig. 1. 
1877. Amblypterus arcuatus, E. H. Traquair, ibid. vol. xxxiii. p. 558. 
Type. Head and abdominal region ; British Museum. 
