Physical Structure and older stratified Deposits of Devonshire. 697 



lurian system, and some agree specifically with corals of the highest Silurian 

 groups. On this point we rely on Mr. Lonsdale's determination ; and we 

 give it in his own words : 



Favosites polymorpha, (Goldfuss, PI. XXVII. f, 4. Silur. Syst., PI. XV. f. 2.). Common 



in the Plymouth* and Ogwell* Hmestones, and it occurs also at Barton and Torquay, and 



in slate at New Quay, Cornwall. 

 spongites (Goldf., PI. XXVIII. f. 1. Silur. Syst., PI. XV. f. 8, 9.). Plymouth 



and Ogwell limestones. 



? ramosa, (Brassart). The Rev. D. Williams's cabinet. Near Chudleigh. 



Gothlandka, (Goldf., PI. XXVI. f. 3. Silur. Syst., PI. XV. his, f. 3, 4.). Plymouth 



limestone ; apparently scarce. 

 fibrosa, (Goldf., Silur. Syst., PI. XV. bis, f. 7.). A single imperfect specimen of 



this species is in Professor Sedgwick's collection from Fowey ; it occurs also at Barton, 



near Mary Church. 

 Pontes pyriformisf, (Ehrenberg, Goldf., PI. XXI. f. 7. Silur. Syst., PI. XVI. f. 2.). Common 



in the Ogwell limestone ; it occurs also near Plymouth, and Mary Church. PI. LVIII. 



fig. 4. 

 Cyathophyllum turbinatum, (Goldf., PI. XVI. f. 8. Silur. Syst., PI. XVI. f. 11.). A fragment 



in the Rev. R. Hennah's collection. 

 ccespitosumf, (^Goldf., PI. XIX. f. 2.). Very common near Plymouth and Ogwell; 



it occurs also near Torquay. PI. LVIII. f. 8 to 8 d. 

 Astrea (Favastrea) helianthoides, (De Blainville, Cyathophyl. helianthoides, Goldf., PI. XX. 



f. 2.). Two specimens in calcareous slate from near Plymouth in the Rev. R. Hennah's 



collection, and one in limestone in the Museum of the Geol. Soc. ; presented by the late 



Mr. Harvey. 



( ) pentagonaf, (De Blainville, Cyathophyl. pentagonum, Goldf., PI. XTX. 



f. 3.). Plymouth, Ogwell, and Torquay limestones ; not very abundant. PI. LVIII. 

 f. 1,1a. 



{Siderastrea, De Blainville,) Hennahii f, (sp. n.). Plymouth limestone and Barton 



Quarry near Mary Church. PI. LVIII. f. 3 to 3 b. 



Stromhodes vermiciclaris, {Cyathophyl. vermiculare, Goldf., PI. XVII. f. 4.). Common in the 



Plymouth and Ogwell limestones. PI. LVIII. f. 7, 7 a. 

 Stromatopora polymorpha\, (Goldf., PI. LXIV. f. 8.). Two specimens from Appleway and 



near Teignmouth, in the collection of Mr. D. Sharpe. PI. LVIII. f. 2. 

 Coscinopora placenta ? f, (Goldf., PI. IX. f. 18.). Common in the Ogwell and Plymouth lime- 

 stones ; it occurs also at Torquay, Whatcomb, Appleway, and Newton Bushel. PI. LVIII. 

 f. 5 to 5 d. 

 Turbinolial celtica\, (Lamouroux, PI. LXXVIIL f. 7, 8.). Dinas Cove, Padstow, Berry 



Pomeroy, and Fowey. PI. LVIII. f. 6. 

 Fenestella antiqua-\, {Gorgonia antiqiia, Goldf., PI. XXXVI. f. 19. Silur. Syst., PI. XV. 

 f. 15-18.). Common at Fowey, Petherwin ; in yellow rotten slate in the neighbourhood 

 of Plymouth; in North Devon the fossil occurs at Saunton, Linton,? and north of 

 Barnstaple. PI. LVIII. f. 10 to 10 b. 

 Cystiphylluvi Damnoniensef, (sp. n.). Very abundant near Ogwell ; it occurs also near Ply- 

 mouth, but sparingly. PI. LVIII. f. 1 1 to 1 1 b. 

 Scyphia turbinata\, (Goldf., PI. II. f. 13.) Slate near Plymouth. PL LVIII. f.9. 

 The most abundant of the above species in the limestones of South Devon are Favosites poly- 

 morpha. Pontes jjyiiformis, Cyathophyllum ccespitosum, Strombodes vermicularis, Coscinopora 

 placenta, and Cystiphyllum Damnoniense, only the three first of which have been noticed in the 

 Silurian System of England. The limestones are further characterized by the total absence of 

 Catenipora escharoides, and by the absence or extreme scarceness of many of the corals most abun- 

 dant in the Wenlock and lower Silurian formations. 



* The specimens from the Plymouth limestone, are principally in the cabinet of the Rev. R. 

 Hennah ; those from the Ogwell limestone in that of Mr. R. A. C. Austen ; and those from Barton, 

 near Mary Church, and Teignmouth, in the collection of Mr. Daniel Sharpe. 



t The species thus distinguished are figured in PI. LVIII., either on account of their being 

 new, or characteristic of the Devonshire limestones. 



