328 Geological Societij. 



8. Resting upon No. 7. is a shelly limestone, agreeing apparently 

 in dip and strike with the subjacent strata. The fossils are for the 

 greater part the same as in the other beds, consisting of Producta 

 depressa, Atrypa aspera, and a Spirifera which occurs also in No. 6. 



The rock near Dalhousie is a reddish slate, in which Mr. Henwood 

 sought in vain for organic remains. The dip of the lamina; is 70° to 

 the S.E. 



On the opposite side of the river in Lower Canada, the strata con- 

 sist wholly of a brick-red sandstone. 



Near Cambellton, both the Canadian and the New Brunswick 

 banks of the Ristigouche are composed of sandstone and conglomerate 

 with imperfect fragments of vegetable remains. The strata are cut 

 through by numerous trap dykes, manj' of which have produced 

 faults, but in an equal number of instances no similar effects are 

 visible. 



At John Pratts, seven miles above Cambellton on the New Bruns- 

 wick side of the Ristigouche, is a slaty limestone enclosing Crinoidea 

 and a few other obscure organic bodies. The beds dip W., and strike 

 20° E. of N. A thin-bedded limestone, in which the author could 

 discover no fossils, extends to the Maramajaw, and thence to the Up- 

 salguilch river. In some places it is much traversed by trap dykes, 

 and at the Little Falls of the Upsalguilch by dykes of felspar porphyry 

 resembling the Cornish elvans. The strike of the strata is N. and 

 S., and the dip W. 



3. " On the locality and geological position of Cucullcea decussata," 

 by Joshua Trimmer, Esq., F.G.S. 



The object of this communication is to determine the geological 

 formation to which the siliceous casts of the Cucullcea decussata really 

 belong, it having been stated that they occur at Faversham in Kent*, 

 in a bed of greenish siliceous sand, placed by Mr. Webster above the 

 chalk f ; in the upper greensand of Kent, but witli a doubt ^ ; in the 

 lower greensand of Kent and Sussex, and in the greensand of Black- 

 down § . 



The fossil was first described by Mr. Parkinson, who states, on the 

 authority of the late Mr. Francis Crow, that it was found at Faver- 

 sham associated with a silicified shell exactly agreeing with the Strom- 

 bus pes Pelicani of the Devonshire whetstone pits ; but he adds, that 

 it is specifically different from the Cucullrea of Devonshire, and he 

 proposes to designate it by the name of C. decussata. The collection 

 of the late Mr. Crow, now in the Canterbury Museum, contains three 

 specimens of this fossil, which, with two others presented by Mr. E. 

 Crow to the Geological Society, are said by the author on the au- 

 thority of that gentleman, to have been found in digging a ha-ha at 

 Nash Court, about two miles from Faversham. Mr. Trimmer like- 



* Parkinson, Org. Rem., vol. iii. p. 171. Min. Con., vol. iii. p. 8. Geoi. 

 Trans., Second Series, vol. iii. pi. 1. p. 212. 



+ Geol. Trans., First Series, vol. ii. p. 195. 



X Geol. Trans., Second Series, vol. iv. pi. 2. pp. 203, 35G. Ibid., vol. 

 iii. pi. 1. p. 213 ; vol. iv. pi. 2. pp. 128, 157, 356. 



§ Ibid., vol. iv. pi. 2. pp. 240, 35G. 



