314 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Feb. 2/, 



under the Cornbrash, was sufficiently carbonized to be used as fuel 

 by the workmen and poor of the neighbouring cottages. The coni- 

 ferous structure was easily detected by the microscope. I did not 

 find any cones or other seed-vessels, and but few vestiges of foliage, 

 nor did I meet with traces of Cycadece, although these plants have 

 been occasionally found at Swindon. 



Emerging from this section at 10^ miles, and traversing a slight 

 excavation at Yarnbrook (11 J miles) in the same shale, and some 

 heavy cuttings in Kimmeridge clay, at 1 4 miles, we come to a very 

 interesting section through the Ham Fields at the Westbury Terminus 

 (see Section, fig. 2). Here a fault brings the greensand in contact 

 with the Kimmeridge clay, and after four more displacements the 

 greensand resumes its position, and forms the plain on which the 

 Terminus is erected. 



One of the depressions caused by a fault in this cutting is filled up 

 by a deposit of bones belonging to elephants, horses, deer, and 

 other quadrupeds : these remains were so plentiful that the workmen 

 repaired the waggon roads with them. A well at the Station pierces 

 the several beds, and enables us to continue the section half a mile 

 further. 



Organic Remains. 



The abundance of fossils in some of the beds was truly astonishing, 

 and especially the immense numbers of the shells and osselets of Ce- 

 phalopoda. Often on exposing an area of clay or shale many yards in 

 extent, the whole surface was studded with the glittering pearly shells 

 of Ammonites of various species, and the numerous phragmacones of 

 Belemnoteuthis, intermingled with Belemnites. With these relics of 

 deep-sea molluscs were associated in equal abundance shells of the 

 genera Rostellaria, Turritella, Aiiricida, &c., and throughout the 

 mass, stems, branches, and fragments of pines and firs were imbedded. 

 Groups of Ammonites scarcely larger than a pin's head, were often 

 lying together as if they were clusters of the embryo shells, and Be- 

 lemnites as minute as a small wire were not uncommon. 



I had the good fortune to obtain a few Belemnites that showed the 

 capsule of the guard, and the form of the peristome of the phragma- 

 cone ; and likewise osselets of the Belemnoteuthis with the apical 

 part of the phragmacone surrounded by its fibrous investment. These 

 specimens have been figured and described by my father in the 

 Philosophical Transactions. It may be interesting to remark, that 

 although ink-bags in conjunction with the phragmacones of the Be- 

 lemnoteuthis were very frequent, I never on any occasion found an 

 ink-bag naturally attached to the phragmacone of abelemnite*. 



In the subjoined lists of organic remains by Mr. Morris, the spe- 

 cies and genera found in the respective strata are enumerated, and a 



* I lately saw, in Dr. Warren's Collection, at Boston, U.S., a specimen, which 

 might lead to an error with regard to this subject. It consisted of a belemnite 

 with indistinct traces of the prolongation of the phragmacone, and on the top of 

 it was loosely tied the ink-bag of a belemnoteuthis ; the specimen being ticketed, 

 " Belemnite with ink-bag, Oxford Clay, England." 



