BUDLEIGH-SALTERTON PEBBLE-BED. 353 



Of this shell Mr. Vicary has found two examples. Externally it resembles more than 

 one Devonian, as well as Carboniferous species. The interior not having been found, it 

 cannot be critically described. It is a Devonian species, for it has been found in the 

 same pebble with Mhyn. inaurita, Sandb. 



31. Discina Vicahyi, Dav. Sil. Mon., PI. VII, fig. 13 ; B. S. Sup., PI. XL, figs. 11 



—13. 



At p. 67 of my Silurian Monograph I figured and described this species, stating at 

 the same time that I could not say whether it was a Devonian or a Silurian species. 

 That uncertainty still prevails, because no other known Brachiopod has been found along 

 with it in the same pebble. Two or three additional specimens have been found since 

 I described the shell in 1866; and Mr. Vicary has picked up a reddish quartzite pebble, 

 exactly similar to those that occur at Budleigh-Salterton, on the Chisel Bank, containing 

 a specimen of this fossil, and of this a figure is given in PI. XL, fig. 13. It bears 

 resemblance to the Orbicula Daleidensis, Schnur (' Eifel. Brachiopoden,' tab. xliii, fig. 7), 

 a Devonian species. 



32. Discina incerta, Dav. B. S. Sup., PI. XL, figs. 14, 15. 



Discina incerta, Dav. Quart. Journ. Geol. Soc, vol. xxvi, p. 77, pi. iv, fig. 7, 1869. 



Shell nearly orbicular ; apex one third of the diameter from the margin ; upper valve 

 moderately convex. 



Length 3^, breadth 3, height 1 line. 



Of this small species I have seen several specimens from Budleigh-Salterton ; but, as 

 no other fossil has occurred along with it in the same pebble, I cannot say whether it is 

 a Devonian or a Silurian species. 



33. Discina ? Edgelli. Dav. Quart. Journ. Geol. Soc, vol. xxvi, p. 78, pi. iv, fig. 8, 



1869. 



In the ' Quart. Journ. of the Geol. Soc.,' I gave a figure of an almost circular shell, 

 much depressed and smooth. It has much of the external shape of an Obolus, but the 

 material was not sufficient to enable me to refer it to any species with which I was 

 acquainted. 



