925 EXPLANATION OF THE PLATES. 
Fic. 14.-CHoNETES HARDRENSIS, Piillips, sp. 
Orthis, Pal. Foss., p. 188. Chonetes, Davidson Mon. Brit. Carb. Brach., 
186 
Poa Bue: Dev. Brach., pl. xix., fig. 7. 
Urrer Devonran and CARBONIFEROUS —“ Exceedingly common in the 
Upper Devonian grits and shales of North Devon. At Marwood and 
Braunton it is very abundant. It occurs also in several localities in 
the neighbourhood of Barnstaple; at Linton, and in other localities. 
Mr. Pengelly has found this shell in dark-grey slate at Black Hall, near 
Totnes. The identity of the Carboniferous species with that published 
under the denomination of C. Hardrensis cannot be doubted.” Brit. Dev. 
Brach., p. 95. 
Fic. 15,—SrTRoPHALOSIA PRODUCTOIDEs, Murchison, sp. 
Orthis, Murch. Bull. Soc. Géol. de France, vol. xi., p. 254. 
Leptena caperata, Trans. Geol. Soc., 2nd ser., vol. y., p. 704. 
Strophalosia, Davidson, Brit. Dev. Brach., p. 97. 
Original. Cast. Upper Devonian, Braunton, NorthDevon. Mus. G.S. I. 
Upper Drvontan.—It is exceedingly abundant in the state of casts in the 
Upper Devonian grits and shales of North Devon ; such asat Braunton, 
Pilton, &c. It is also very common at Petherwin, in Cornwall. Brit. 
Dev. Brach., p. 99. 
