Vol. 69.] THE ' XELLOWAT ROCK ' OF SCARBOROUGH. 155 



Table II. — Species and Suggested Zones. 

 Zones. Species. 



Gregariwm Quenstedtoceras dissim He Brown sp . 



Ammonites fun if mis Phillips. 

 Ammonites lenticularis Phillips. 



Vertumnus I'crisphinctes rotifer B rown sp. 



Athleta Hecticoceras nodosum J. Sowerby sp. 



do. (grey sandstone,) Ammonites binatus Bean-Leckenby = several 



Perisphinctean forms. 

 Koenigi Ammonites rowlstonensis Young & Bird. 



These lists of ammonites total nearly sixty species, that is, about 

 double the number which Leckenby mentioned ; yet there are 

 certainly several more. 



Appended are the original section as described by Leckenby and 

 a more modern section published by Fox-Strangways. It will then 

 be possible to see how these compare with the matrices of the 

 ammonites, and how they can be zoned. 



Section I. The Kelloway Rock at Bed Cliff (Leckenby). 1 



Thickness in feet. 



' A. Moderately compact irony sandstone, li foot thick, traversed by 

 darkened veins of the same metallic character, across which 

 Ammonites are often placed, and which divide the fossil into 

 separate portions when an attempt is made to extract it. This 

 bed is characterized by the presence of Am. Koenigi, Am.jicxi- 

 costatus, and Belemnites tomatilis. Am. flcxicostatus is here 

 special to the bed [H] 



'B. Loose friable sand and sandstones, without fossils 4 



' 0. Bed similar to A, but much richer in organic remains, containing, 

 besides Am. Kcenigi and Belemnites tomatilis, Am. sublcevis, 

 A. Gowerianus, A. Chamusseti, Pholadomya acuticosta, Modiola 

 pulckra, TerebratulcB, Gryphcea dilatata, and other shells. It 

 is more nodular and cherty than the upper zone, and its fossils 

 are better preserved 1§ 



' D. Compact sandstone, entirely unfossiliferous, with the rare 

 exception of a stray Belemnite or Ammonite in the centre 

 of one of its huge blocks 20 ' 



Section II. The Kellaways Rock at Red Cliff (Fox-Strangways). - 

 ' Shales of the Oxford Clay. Thickness in feet. 



Few oolitic nodules. 



S § I ( Hard band, very oolitic 1 



» ° S • ' ^°^ sna ly r ock, like Oxford Clay, but much more 



«q g "£ J calcareous. Belemnites 9 



J§ § ^% ] Soft sandstone 3 



^ja e jj J Red irony rock full of Gryphcea dilatata. Oolitic in 



"^S.WS I upper part 6 



Sandstone soft in places, sometimes very hard and 

 siliceous ; weathering into large doggers. Avicula 



in lower part 4 



Soft sandstone and hard doggers, few fossils 10 



Soft yellow sandstone with Gryphcea, etc 6 



Yellow sandy shales 8 



Grey shales of the Cornbrash.' 



1 Q. J. a. S. vol. xv (1859) p. 5. 



2 ' The Jurassic Rocks of Britain : vol. i — Yorkshire ' Mem. Geol. Surv. 

 1892, p. 280. 



