PE^^GELLT — POSSILS OF DEVOIJ" AND CORNWALL. 



19 



in common with those of the Carboniferous group, namely, six Echi- 

 noderms, one Crustacean, six Bryozoons, twenty-four Brachiopods, 

 four Lamellibranchiates, ten Gasteropods, and seven Cephalopods, 

 but no corals or sponges ; so that it cannot be said that " there is a 

 blending of Silurian and Carboniferous corals in Devonshire," what- 

 ever there may be elsewhere ; for though, as has been stated, three 

 Silurian corals have been found, not one referable to the Carboniferous 

 Eauua has been met with there. This assertion is made on the au- 

 thority of Messrs. Edwards and Haime, who, in their monograph on 

 ' The British Fossil Corals from the Mountain Limestone,' state that 

 " seventy-six species have already been found in the deposits apper- 

 taining to this geological division, and the presence of none of these 

 corals has as yet been satisfactorily proved in beds belonging to any^ 

 other period."* Again, in their monograph on ' British Devonsiweto^tr 

 Eossil Corals,' they say, — " Three of these Devonian fossils exist 

 also in the Silurian rocks, but all the others appear to be peculiar to 

 the Devonian period. "f This was the language, in 185H, of the 

 zoophytologists selected by the Palseontographical Society to prepare 

 a monograph on this branch of palaeontology, who were thoroughly 

 acquainted with the literature of the subject, and who had had access 

 to almost every public and private museum and collection in the 

 United Kingdom. 



The fifty-eight species which passed from the Devonian to the 

 Carboniferous period are found in the three principal fossiliferous 

 deposits of Devon and Cornwall, as exhibited in the following 

 table : — 



TABLE III. 





Totals. 



L. S.D. 



U.N.D. 



U.c. 





6 



3 



2 



1 





1 



1 









6 



3 



2 



"2 





24 



15 



8 



7 





4 



2 





2 





10 



6 



"3 



3 





7 



4 



2 



3 





58 



34 



17 



18 



It is, perhaps, worthy of remark that the five areas have a smaller 

 number of organic forms in common with one another — closely con- 

 nected as they are both in space and time — than they have, as a 

 whole, with Devonian deposits in continental Europe and elsewhere 

 beyond the British Isles, or with the Carboniferous rocks of Ireland 

 and central and northern England. 



* Monograph of British Fossil Corals/ by Messrs. Edwards and Haime, p. 150. 

 t Ibid. p. 212. 



