276 SIIXKTA. [Chap, XL 
places with those of the Eifel Limestones in the Ehenish Provinces is 
undoubted. 
The disjointed and occasionally inverted masses of South Devon are 
easily brought into comparison with the clear order of Xorth Devon and 
West Somerset*. This is in great measure owing to the numerous and well- 
preserved fossils of its extensive limestones. These are on the parallel 
of those of Combe Martin and Ilfraconibe (c of the section at p. 272) ; and, 
rising in great masses near Plymouth and Ogwell, they range, with intervals, 
to Newton Bushel and Torquay t- They are laden with Corals and Shells, 
many species of which occur in rocks of the same age in North Devon, and also 
in various parts of the continent of Europe, and notably in the limestones 
of the Eifel, the Ehenish Provinces, and Belgium. Now many of these 
fossils are quite peculiar ; for, whilst they exhibit an intermediate cha- 
racter (approaching in the lower beds of this series to those of the Silurian 
system, though almost all distinct, and in the upper strata to those of the 
Carboniferous era), there can be no doubt that they constitute an indepen- 
dent group. 
The species known to occur in the limestone bands of the Middle or Ilfra- 
conibe group, stretching froni "Widmouth through Combe Martin, Twitchin, 
Siinonsbath, Newland, Luckwell, Luxborougli, Higher Broadwater, Huisk and 
Nettleconibe, and thence to the Quantocks, are precisely the same as foimd at 
Newton Bushel, Plymouth, Ogwell, fee. : they are Heliophylluni Hallii, M.-Edw., 
Favosites cervicornis, Blainv., Petraia celtica, Lonsd., Cyathophylluni Boloni- 
ense, Blainv., C. csespitosuni, Goldf., Hallia Pengellyi, M.-Edw., Cystiphylluni 
yesiculosimi, Goldf., Pleurodictyuni problem aticum, Goldf., &c, with the Amor- 
phozoan Stromatopora concentrica, Goldf. j and they are accompanied by an 
equally characteristic series of Middle Devonian Brachiopoda. The Corals have 
been described in the Memoirs of the Palaeontographical Society of 1853 by 
MM. Milne-Edwards and Jules Hainie %. 
All the species of Trilobites known in the Silurian system have disappeared, 
and their places are taken by others, of which Bronteus flabellifer, Goldfuss, 
Phacops granulatus, Minister, P. conophtkahnus, Emmrich, P. latifrons, Bronn, 
and P. laciniatus, Ecemer, are striking types both in Britain and on the Con- 
* The differences between the lithologieal sue- glomerates, and slates (or the a b of the previous 
cession in North and South Devon, on the oppo- section) are truly the equivalents of the Lower 
site sides of the great granitic axis of Dartmoor, Ehenish or Coblentzian shelly greywacke and 
are explained by Sedgwick and myself, Trans, sandstone — thus completing the parallel between 
Geol. Soc, 2nd ser., vol. v. pt. 3. p. 635. the British and Ehenish Devonian rocks, and giv- 
t One of the finest collections of the South ing to each a similar base. In respect to the Up- 
Devon fossils was made by Mr. E. A. C. Godwin- per Devonian division, all foreign geologists who 
Austen, whose researches in the field, and whose classify by organic remains, including M. de Ko- 
study of the organic remains, so materially con- ninck, whose opinions will be cited in a subsequent 
rributed to a correct knowledge of the stratifie Chapter have placed the Clynienia-limestone and 
rocks of Devonshire. See Trans. Geol. Soc, 2nd the Cypridma-schist in the Devonian system. I 
ser., vol. vi. p. 433 ; and Lonsdale, ibid. vol. v. p. 721. must therefore dissent from a proposal of the late 
In a Memoir on the palaeozoic rocks of the Bou- Mr. D. Sharpe, to remove these passage-beds to 
lonnais (Quart. Journ. Geol. Soc. vol. ix. p. 244), the Carboniferous series. 
Mr. Austen, like myself, classes the Petherwin and J My friend Mr. Lonsdale does not participate 
Pilton beds with the Devonian rocks, whilst he in the opinion of these authors respecting some of 
separates the South Devon limestones of Newton the Corals which they refer to the genus Favo- 
and Ogwell from those of Ashburton, Bickerton, sites. I earnestly trust that his health will permit 
and Chudleigh. If in this popular work I retain him to publish a Eeport on the Corals from the 
the older view, and group together the South Palaeozoic Fonnations of New South Wales, trans- 
Devon limestones, I would in no respect detract mitted to him by the Eev. W. B. Clark, in which 
from the value of such a subdivision. My present he will assign, I doubt not, valid reasons for the 
belief is, indeed, that the lower sandstones, con- distinctions he draws. 
