﻿CEPHALA.SPIDJE. 181 



P. 672. Flattened imperfect specimen ; Downton, near Ludlow. 



Egerton Coll. 



P. 5048. Partially crushed and broken shield, wanting right cornu ; 

 Downton. Presented by John Edward Lee, Esq., 1885. 



P. 4115. Small crushed shield, wanting the external layers and 

 showing the orbits placed as far backwards as in the type 

 specimen ; Abergavenny. 



Presented by Br. B. M. McCullough, 1883. 



42142. A very small shield, in counterpart, probably young of this 

 species ; Heightington. Baugh Coll. 



46568-69, 46877-78. Four very small, much crushed shields, 

 doubtfully referable to young of this species ; Cradley. 



Purchased, 1875. 



37388. Middle portion of shield either of this species or of C. salweyi ; 

 Heightington. Purchased, 1863. 



Cephalaspis salweyi, Egerton. 



1857. Cephalaspis sahveyi, Sir P. Egerton, Quart. Journ. Geol. Soc 



vol. xiii. p. 283, pi. x. fig. 1. 

 1859. Cephalaspis asterolepis, R. Harley, Quart. Journ. Geol. Soc. vol. 



xv. p. 503. 

 1859. Cephalaspis salweyi, R. Harley, ibid. p. 504. 

 1868. Cephalaspis asterolepis, J. W. Salter, Proc. Woolhope Nat. Field 



Club, p. 240, and frontispiece. 

 1870. Zenaspis sahveyi, E. R. Lankester, Fishes Old Red Sandst. pt. i. 



(Pal. Soc), p. 52, pi. xii. figs. 2, 5, 6 (non pi. viii. figs. 2-4), woodc. 



figs. 26, 28 {non fig. 27). 

 1881. Cephalaspis asterolepis, H. Woodward, Geol. Mag. [2] vol. viii. 



p. 193, pi. vi. 



Type. Middle portion of shield ; Ludlow Museum. 



The largest known species, the shield sometimes attaining a total 

 length of 0*18. Shield sharply rounded in front ; orbits placed 

 nearly midway between the anterior and posterior margins ; cornua 

 well developed, slender, and acutely pointed. Superficial tubercu- 

 lations relatively large, sparsely and irregularly arranged. 



The detached tuberculated plates, doubtfully assigned to this 

 species by Lankester, are truly referable to Coccostean fishes (see 

 Phlyctoenaspis anglica, p. 296). 



Form, fy Loc. Lower Old Red Sandstone (Cornstones) : Here- 

 fordshire, Monmouthshire, and Worcestershire. 



