﻿L94 



0STE0STKAC7. 



1854. P/ectrodus (Sclerotitis) pustuliferus, E. I. Murchison, Siluria, 



pi. xxxv. figs. 9-12. 

 1854. Plectrodus mirabilis, R. I. Murchison, ibid. pi. xxxv. figs. 3-8. 

 1870. Euheraspis pustuliferus, E. R. Lankester, Fishes Old Red 

 Sandst. pt. i. (Pal. Soc), p. 58, pi. xiii. figs. 9-14. 



Type. Portions of corrma. 



The type species, of small size, the maximum total length of the 

 shield with its cornua being about 0*05. Cornua flattened from 



Fig. 27. 



Enkeraspis pustulifera (Ag.). — Outline of shield, after Lankester. op., ant- 

 orbital prominence; mc, marginal cells; ip., interorbital prominence; 

 pv., postorbital valley. A. Portion of ornament, much magnified. 



above downwards, twice as long as the body of the shield ; the ex- 

 ternal denticulatious stout, smooth, and irregularly spaced, with 

 or without feeble intermediate points ; superficial tuberculations 

 numerous, small, rounded, and closely arranged. 



Form. § Loc. Upper Ludlow and Downton Sandstone : Hereford- 

 shire. 



45949, a, b. Impression of cornu, and two imperfect shields, figured 

 by Lankester, op. cit. pi. xiii. figs. 11, 13, 14; Downton 

 Sandstone, Ludford Lane, Ludlow. Lightbody Bequest. 



45970, 45973. Cornu and two fragments : Ludford Lane. 



Lightbody Bequest. 



