﻿S ACA.XTHODIT. 



and slender, the head occupying about one sixth of the total length. 

 Pectoral fin-spines relatively large, arched, and longitudinally 

 striated ; pelvic fin-spines very small, about one fifth as large as the 

 pectorals, separated from the latter by a space much less than one 

 half of the distance between them and the anal. Dorsal and anal 

 fin-spines almost directly opposed, of nearly equal size, and more 

 than half as large as the pectoral spine. [Scales unknown.] 



The remarkable form of the head, as described by Sauvage, is 

 doubtless due to imperfect preservation ; and the supposed lower 

 jaw has much the appearance of the styliform cartilage termed 

 ceratohyal by the present writer. 



Form. 6f Loc. Permian : Lodeve, France. 



Not represented in the Collection. 



Acanthod.es wardi, Egerton. 



1866. Acanthodes wardi, Sir P. Egerton, Quart. Journ. Geol. Soc. vol. 



xxii. p. 468, pi. xxiii. . 

 1871. Acanthodes wardii, J. Thomson, Trans. Geol. Soc. Glasgow, vol.iv. 



p. 57, pi. iv. 



1875. Acanthodes wardi, J. Ward, [Proc] N. Staffs. Nat. Field-Club, 

 p. 241. 



1876. Acanthodes wardi, J. W. Davis, Quart. Journ. Geol. Soc. vol. 

 xxxii. p. 335. 



1890. Acanthodes wardi, J.Ward, Trans. N. Staffs. Inst. Mining Engin. 



vol. x. p. 157, pi. v. fig. 2. 

 1890. Acanthodes wardi, R. H. Traquair, Proc. Roy. Soc. Edinb. vol. 



xvii. p. 388. 



Type. Imperfect fish ; collection of John Ward, Esq., Longton. 



A species closely resembling A. bronni in form and proportions. 

 Pectoral fin-spines broad and robust, much laterally compressed, 

 with a single groove and faint ridge nearly parallel to the anterior 

 border and disappearing distally ; other spines similar. Pelvic fin- 

 spines relatively small, about one quarter the size of the pectorals ; 

 pelvic fins extremely elongated, arising at a point about three 

 quarters as far from the pectoral fins as from the anal. Anal fin- 

 spine half as large as the pectoral ; dorsal still slightly smaller, 

 placed a short distance behind the anal. Scales smooth, sometimes 

 faintly hollowed mesially. 



Form. 6f Loc. Coal-Measures : Staffordshire and Scottish Coal- 

 fields. 



36891. Remains of small fish, displaying proportions of pectoral and 

 pelvic fin-spines ; Deep-mine Ironstone, Longton, N. Staf- 

 fordshire. Purchased, 1862. 



