﻿200 08TEOSTRA.CI. 



P. 5043. A typical specimen showing an impression of the inner 

 aspect of the dorsal shield, with a loose portion of matrix 

 lying between the hinder plate of this shield and an 

 equally large, opposed ventral plate, of which the sub- 

 stance is preserved; Bush Pitch, near Ledbury. The 

 portion of matrix representing the space occupied by the 

 soft parts of the animal is very thin, as shown in the 

 transverse section, PI. IX. fig. la. The ventral plate 

 (PI. IX. fig. 7), as seen from the visceral aspect, is flat- 

 tened, marked with the numerous openings of apparently 

 vascular canals, and is not seen to extend beneath the 

 anterior shield. 



Presented by John Edward Lee, Esq., 1885. 



P. 5313. Dorsal aspect of shield, showing portions of the external 

 tuberculated layer ; Bush Pitch. The specimen is shown, 

 of the natural size, in PI. IX. fig. 8, and a portion of the 

 ornament enlarged four times in fig. 8 a. The posterior 

 plate is gently rounded from side to side, with only faint 

 indications of a longitudinal median keel in the hinder 

 half ; and the superficial ornamentation consists of nume- 

 rous rounded tubercles, closely, but irregularly arranged. 

 Presented by George H. Piper, Esq., 1887. 



A fossil of very doubtful relationships, sometimes assigned to the 

 family of Cephalaspidae, is described as follows : — 



Menaspis armata, T. Ewald, Bericht k. preuss. Akad. Wiss. 1848, 

 p. 33; H. B. Geinitz, Dyas (1861), p. 21.— Upper Per- 

 mian (Zechstein) ; Lonau, Harz Mts. [Collection of 

 Dr. Ewald, Berlin.] 



Another supposed ally of the Cephalaspidae is described thus : — 

 Cephalopterus pagei, J. Powrie, Trans. Edinb. Geol. Soc. vol. i. 

 (1870), p. 298, pi. xiv. fig. 16.— Lower Old Bed Sand- 

 stone : Turin Hill, Eorfar. [Collection of James Powrie, 

 Esq., Eeswallie, and Dundee Museum.] 



