ETHERIDGE DEVOiaAN BOCKS AND FOSSILS. 



Table V. (continued). 



647 



Classes, 



Species. 



§' 



o 



i 

 > 



p 



be 



1 



E 



'S 

 1 



Gasteropoda 



Scoliostoma texta, Phill. 



if- 



•X- 



* 

 i«- 



* 

 •X- 



... 



* 

 * 



•X 





nucleobranchiata ... 

 Cephalopoda 



Trochus Boueii, Stein 



Turbo cirriformis, Sow 



subangulatus, Sow 



Vermetus antitorquatus, Phill 



annulosus 



Belleroplioii striatus, Svonn 



Porcellia Woodwardii, Sow 



Clymenia laevigata, Miinst 





undulata, Miinst 



Cyrtoceras armatum, Phill 



bdellatus, PM/ 



fimbriatum, Phill 



marginale, Phill 





nodosum, Phill 





ornatum, Goldf. 









tridecimale, Phill 







serpentinus, Phill 





Nautilus germanus, Phill 



Orthoceras cinctum, Sow 

















In the above Table will be found all the known species: — 

 Amorphozoa : 4 genera and 8 species, all, with one exception (Stro- 

 matopora concentrica), confined to the southern area. Coelenterat-a : 

 23 genera and 50 species; 10 genera and 17 species of which 

 are known in the Ilfracombe group in Xorth Devon and West 

 Somerset ; the physical conditions of the rocks of the two areas, and 

 the small amount of old sea-bottom opened in the north compared 

 with that in the south, will readily account for the wide difference 

 as to number of species, though individually they appear to be 

 as abundant in North Devon, many of the limestones being 

 crowded with corals, especially at Adscombe, on the east flanks 

 of the Quantock Hills (AVest Somerset), and the Combe-Martin 

 area. Echinodermata : 4 genera and 8 species ; and, as far as I 

 know, no species of this group occurs in the Middle Devonian of 

 North Devon ; and, such as they are, they appear confined to the 



