and on the Chalk of Norfolk and Suffolk, Sgc. 



377 



displayed at Thorpe, at Whitlingham^ and in the cliff of Bramerton. We 

 have in a separate communication described the crag^-strata which rest on 

 the chAlk at Bramerton. The chalk is here horizontal^ and is exposed to 

 the depth of about fifteen feet. Immediately on its surface reposes a stratum, 

 one foot thick, of large irregular black flints, which contain many of the 

 usual chalk fossils. Among- the most remarkable fossils of the chalk are the 

 tubiform flints, named by Professor Buckland Paramoudrcs . They are 

 commonly about three feet long-, and pear-shaped with their smaller end 

 (which is sometimes shattered into minute fragments) standing downwards. 

 Their position is invariably at right angles to the parallel and horizontal seams 

 of flint. Occasionally the lower end of one of the paramoudrae is placed 

 vertically at the distance of two or three feet over the upper end of another ; 

 and in that case I have observed that the chalk in the interval is much im- 

 pregnated with silex. When near the upper part of the chalk, they are 

 sometimes filled more or less with sand ; but usually with chalk, which then 

 contains more silex than that in which they are imbedded. Numerous fine spe- 

 cimens of the paramoudras are to be seen in the neighbourhood of Norwich, 

 where they are used for posts. Other large masses of flint occur, upwards 

 of three feet in diameter, the forms of which, however irregular, evince their 

 organic origin, and lead us to refer them to some gigantic species of sponge 

 or alcyonium. The other fossils which are found in the chalk at Bramerton 

 or in its immediate neighbourhood are, 



^ Spatangus Cor maximum 



? (Smith, No. 3.) 



Conulus depressus 



Fxhinites. 



Galea 



albogalerus 

 ovata 



pustulosa (Smith) 

 a small mamillated species 

 15. 

 15. 

 118. 

 118. 

 15. 



Cidaris, 

 Terebratula carnea Sowerby 

 subundata 

 plicalilis 

 octoplicata 

 intermedia 



Alcyonium conoides, and other species, 

 besides three species of Ostrea, two of Inoceramus, three of Pecten, plagio- 

 stomae, modiolae, serpulaB, belemnites, spong^es and flustrae. Mr. Smith 

 further enumerates the species of echini, and the teeth, palates, and ver- 

 tebras of fishes 



3 c 2 



