A MONOGRAPH 



OP THE 



DEVONIAN FAUNA OP THE SOUTH OF ENGLAND. 



VOL. III. 

 THE MARWOOD AND PILTON BEDS 



OF 



NORTH DEYON AND SOMERSET. 



In the year 1840, Sowerby described twenty-four Devonian species from the 

 beds of the Pilton Series ; in 1841 Professor Phillips increased the number to 

 seventy ; and in 1852 M'Coy added several species to the list. 



Since that time I do not know that many new forms have been described. 

 Professor F. A. Romer in 1855 figured an Aviculoipecten which appears to have 

 escaped the notice of English geologists ; and in 1863 Salter described, without 

 figuring, a species of his new genus Curtonotus. Mr. Etheridge, in his list of 

 Devonian Fossils, has catalogued the names of several additional Continental forms. 



The present attempt to revise this interesting fauna took its rise in 1890, from 

 a letter of my lamented friend Mr. Thomas Roberts, F.G.S., who drew my attention 

 to the rich collection made by Mr. Townshend Hall, F.G.S., and now in the 

 Barnstaple Athenseum, of which Mr. Roberts prepared, but I do not think 

 published, a list. Soon afterwards I visited Barnstaple by the kind invitation of 

 Mr. Townshend Hall, and began the study of the fauna; and I desire first of all to 

 acknowledge the exceeding kindness with which he and other friends have helped 

 me in an undertaking which has proved much longer and more difficult than I then 

 expected. Nothing could exceed the kindness and courtesy with which the 

 authorities of the British Museum, the Museum of Practical Geology, the Wood- 

 wardian Museum, and the Barnstaple Athenaeum have permitted me the free use of 

 their fine collections, and in other ways assisted me ; and to Dr. Henry Woodward, 



