1868.] 



HOLL SOUTH DEVON AND EAST CORNWALL. 



451 



Table III. (continued). 



Species. 



Localities. 



§1 



Streptorhynchus gigas, M' Coy 



crenistria, Vhill. 



persarmentosa, M-Coji 



umbraculum, Schlofh 



Strophomena rhomboidea, var. analoga 



Fhill , 



Pterinea spinosa, Phill 



Loxonema lincta, Phill. , 



Bel leropbon bisulcatus, Rom 



Pleurotomaria cancellata. Phill. 



Orthoceras Ludense, Phill. non Sow , 



Serpula, n. sp , 



Pteraspis (Scaphaspis) Cornubicus, M'Coy .. 



Cepbalaspis ? Carteri, M'Coy 



And remains of several other species of 



fish 



British. 



Europe. 



^ De la Beche, Mem. Geol. Surv. vol. i. p. 101. ^ Phill. Pal. Fos. p. 32. 

 ^ Pengelly in Davidson's Monograph, Palaeont. Soc. ^ Salter in Col. Pengelly. 

 ° Etheridge, /. c. table ii. p. 621. ^ Marchison, Trans. Eoy. Geol. Soc. of 

 Cornwall, 33rd Ann. E.ep. ''' Couch on Foss. of Cornwall, Trans. Roy. Geol. Soc, 

 of Cornwall, 33rd Ann. Rep. ^ Pattison, Trans. Roy. Geol. Soc. of Cornwall, 

 35th Ann. Rep. ^ CoU. Mus. Pract. Geol. ^^ Siluria, 4th Edit. p. 399. t and 

 at Ashbiirton. \ Meadfoot. || Mudstone Bay. 



not, as already stated, include all the forms ; and of these 42 species, 

 5 have not been meet with elsewhere, leaving therefore 37 species 

 for comparison, all of which, with the exception of two, viz. Orthis 

 hipparionyx and Pterinea spinosa are known to occur in Middle 

 Devonian rocks, either of Britain or Europe, and all, with the excep- 

 tion of the above, and Spirifera primceva, and perhaps Spirifera 

 hysterica (the occurrence of this latter species in South Devon being 

 not quite certain), are met with in British Middle Devonian rocks. 

 On the other hand, only 8 of the 37 species are known in the Linton 

 beds, and these, with the exception of Pterinea spinosa, which occurs 

 at South Petherwin, and the doubtful Spirifera hysterica, Schloth,, 

 before alluded to, all pass up from the Linton group into the middle 

 division of the system, either in Britain or on the Continent of Europe 

 It would appear, therefore, that the chances against these rocks 

 being Lower Devonian are as 35 to 2. 



The fossil evidence respecting the position of the Padstow rocks 

 is still more meagre ; but as they are, I believe, admitted to be 

 Middle Devonian, no question here arises. Orthoceras Ludense, Phill., 

 which is also a Pethervdn fossil, is said to be abundant here, and 

 Goniatites are stated to occur*. 



* Pattison, Trans. Roy. Geol. Soc. of Cornwall, 35th Ann. Rep. 



