452 



Mr. Austen on the 



Scattered over the surface of the soil about Lindridge, near Ideford, are large 

 blocks of a compact siliceous rock, containing much green earth, and many well- 

 preserved greensand fossils ; they also include rounded pebbles from the harder 

 beds of the carbonaceous series. These blocks occur only at this particular spot, 

 which is just below the point where a mass of trap (certainly of subsequent date 

 to the new red sandstone) is hid by the greensand of Haldon ; they are unhke 

 any of the beds to be found in place on either of the Haldons ; and judging from 

 the change which the trap has elFected in beds of new red sandstone, these masses 

 present just such a character as would have been produced by the igneous rock had 

 it come in contact with the lower greensand, which probably was the case. 



The greensand beds of the Haldons and the Bovey valley are very far from 

 containing the same number of species of shells as the Blackdown ; I have, how- 

 ever, collected the following species : — 



Exogyra halyotoidea, Sow. Min. Con. 



conica. Sow. ibid. 



Pecten asper, Lam. Anim. sans Verteb. 



quinquecostatus, Sow. Min. Con. 



quadricostatus, Sow. ibid. 



Stutchburianus, Sow. Geol, Trans. 2 Ser. 



vol. iv. 



Lima semisulcata, Sow. ibid. 



proboscidia, Sow. Ponswine. 



Inoceramus concentricus, Parkin. Geol. Trans, 



1 Ser. vol. V. Ponswine ; Staple Hill. 



gryphaeoides. Sow. Min. Con. 



mytiloides, Mant. Geol. South Downs. 



Gervillia aviculoides, Sow. Min. Con. 



solenoides, Defrance, Diet. Sci. Nat. 



Trigonia aliformis, Sow. Min. Con. 



spectabilis, Sow. ibid. 



scabra, Lam. Envir. de Paris. 



daedalia, Park. Org. Rem. 



excentrica, Park. ibid. 



Pectunculus umbonatus, Sow. Min. Con. 



Pectunculus sublaevis, Sow. Min. Con. 

 Cucullaea carinata, Sow. ibid. 

 glabra. Sow. ibid. 



fibrosa. Sow. ibid. 



Cardium Hillanum, Sow. ibid. 



proboscideum, Sow. ibid. 



Venus angulata, Soto. ibid. 

 gigantea. 



lineolata. Sow. Min. Con. 



caperata, Sow. ibid. 



sublaevis. Sow. Geol. Trans. 2 Ser. vol. iv. 



Tellina inaequalis. Sow. Min. Con. 



striatula. Sow. ibid. 



Mya laeviuscula, Soio. Geol. Trans. 2 Ser. vol. iv. 

 mandibula. Sow. Min, Con. 



Auricula incrassata, r. Sow. ibid. 



Littorina pungens, Sow. Geol. Trans. 2 Ser. vol. i v. 



Turritella, n.s., r. 



Serpula filiformis. Sow.* Geol. Trans. 2 Ser. vol. iv. 



Remarkable differences are observable in the above suite, when compared with that contained 

 in the rich fossiliferous sand of the hills about Sidmouth, not only in the species but in the condition 

 in which they occur. At the latter place, as already described, are beds of shingle, with Serpulae and 

 large oysters, apparently in the very places they occupied when living, surmounted by beds with the va- 

 rious Blackdown species enumerated by Dr. Fitton, facts which would indicate an increasing depth of 



* The corals of the greensand of England have not been described : none are enumerated in Dr. 

 Fitton's valuable table. Large branched Cyathophylla abound m the greensand of Sidmouth ; they are 

 numerous in that of Haldon, together with Astrea elegans, A. escharoides, Retepora clathrata, Esckara. 



