Geological Society. 329 



wise mentions as independent evidence of these fossils having been 

 found at Nash Court, that it is stated on both editions of Mr. 

 Greenough's Map, that sihceous fossils occur there. 



A careful examination of the specimens presented to the Geologi- 

 cal Society by Mr. E. Crow, has verified the correctness of Mr, 

 Parkinson's opinion, that the Favershara shell is specifically distinct 

 from the Cucullaepe of the greensands. 



The strata of Nash Court, Mr. Trimmer says, undoubtedly belong 

 to the lowest sands of the London clay, and to that portion which is 

 very near the junction with the chalk. 



In the village of Boughton, not far from Nash Court, Mr. Trim- 

 mer has examined two sections situated to the east and west of the 

 50th mile-stone, and nearly on a level with the ha-ha, in which the 

 Cucullaa decussata was found. The strata consisted of white and 

 ferruginous sand with layers of ferruginous clay, in some parts con- 

 siderabl}'- indurated. He did not observe any organic remains, but 

 shells are reported to have been found in the eastern section. At,a 

 greater elevation on the side of Boughton Hill, and a little below 

 the junction of the sands with the brown clay, which forms the sum- 

 mit of the hill, are courses of geodes of a ferruginous sandstone very 

 like some of the Wealden sandstone, and lined with mammillary sili- 

 ceous deposits and quartz crystals. Casts of plastic clay shells are 

 occasionally found in the sandstone, but more abundantly in the al- 

 ternate layers of indurated ferruginous clay. From a bed four feet 

 thick of this sandstone worked in a quarry in the wood on the side 

 of Boughton Hill, Mr. Trimmer obtained casts of Calyptraa trochi- 

 formis, Rostellaria Sowerbii (Strombus pes Pelicani of Mr. Parkinson), 

 Potamides intermedium, and a Venus which has been considered a 

 variety of V. ovalis, but is clearly distinct. Similar remains are stated 

 by the author to occur In the upper part of the clilFs at Reculver, 

 either In loose masses, or sand slightly indurated. In conclusion, 

 Mr. Trimmer acknowledges the assistance which he received in pre- 

 paring the communication. 



4. " A description of a portion of the skeleton of the Cetiosaurus, 

 a gigantic extinct Saurian Reptile occurring in the Oolitic forma- 

 tions of different portions of England," by Professor Owen, F.R.S., 

 F.G.S. 



Tlie remains described in this memoir consist of vertebriE and 

 bones of the extremities obtained hy Mr. KIngdon from the oolite 

 quarries of Chipping Norton, in Oxfordshire ; of vertebrae and other 

 bones from the oolite of Bllsworth, near Northampton, transmitted 

 to the author by Miss Baker ; and of other remains from the oolite 

 of Staple Hill, Wotton, three miles north-west of Woodstock ; from 

 the oolite near Buckingham ; the Portland stone at Garsington and 

 Thame, In the collection of Dr. Buckland : Mr. Owen has likewise 

 examined a vertebra and some bones of the extremities of the same 

 saurian from the Yorkshire oolite, and preserved in the Scarborough 

 Museum. 



Caudal Vertebra;. — A caudal vertebra from near Buckingham, 

 •which presented the anchylosed neural arch entire, but with the 



F/iit. Ma<i, S. 3. Vol. 20. No. 131. April 184-2. Z 



