﻿444 



ME. E. H. EASTALL ON THE 



[Aug. 1905, 



foregoing list, but have taken it, as it stands, from the Geological- 

 Survey Memoir. In their original list Tate & Blake gave several 

 more species of ammonites, which are, however, rejected by the 

 officers of the Geological Survey. They seem to be species founded 

 by Simpson on minute variations. 



I now proceed to describe the other beds exposed at Blea Wyke, 

 in ascending order : — 



(1) The Lingula-Beds. 



These beds consist of two parts : (i) some 7 feet of shale at the 

 base, and (ii) above this 25 feet of grey sandstone and sandy shale. 

 The following species have been found in these beds l : — 



Heterocidaris (Bseudodiadema) 

 wickensis. 



Eryma (GlyphcBa) Birdii. 

 GlyphcBa sp. cf. Gl. rostrata. 



Discina (Orbicula) reflexa. 

 Ling id a Beanii. 

 Bhynchonella cynocephala. 

 Terebratida trilineata. 



Avicula (Monotis) substricda. 



Gervillia Hartmanni. 



Beet en demissus. 



Becten Silenus. 



Becten wickensis. 



Binna cuneata. 



Cucullcea cancellata. 



Goniomya angulifera (?). 

 Gresslya donaciformis. 

 Gresslya peregrina. . 

 Gresslya Seebachii. 

 Mod tola (Mytilus) scalprum (?). 

 Bholadomya fidicida. 

 Trigonia Leckenbyi. 

 Venus tenuis. 



Cerithium quaclrilineatum. 

 Cerithium quinquepunctatum. 



Ammonites aalensis. 

 Ammonites comensis. 

 Belemnites Bucklandi. 

 Belemnites inornatus. 

 Belemnites irregularis. 

 Belemnites Milleri. 



The most important forms here are Lingula Beanii, Bhynchonella 

 cynocephala, Terebratida trilineata, and Ammonites aalensis, all of 

 which denote a facies rather Oolitic than. Liassic. 



This bed forms the lower part of the scaur at Blea Wyke Point, 

 south of the small bay formed by the soft Striahdus- Shales. 



(2) The Seoyula-Beds. 



Above this come the Serpida-Be&s, which are about 10| feet thick,, 

 and are very conspicuous in the cliffs, on account of their very pale 

 colour, nearly white on a weathered surface. The brown band 

 really differs from the rest only in its colour, but it is very persistent. 



The fauna of these beds is less abundant than in those below ; 

 it is as follows (teste C. Fox Strangways, op. supra cit. p. 153) : — 



Serpula deplexa. 



Vermicidaria compressa. 



Lingula Beanii. 



Waldheimia carinata var. Blalcei. 



Becten inter co status. 



Binna ampla (?). 

 Cardium striatidum. 

 Gresslya, peregrina. 

 Bentalium elongatum. 

 Ammonites aalensis var. Moorei. 



1 C. Fox Strangways, ' The Jurassic Bocks of Britain : vol. i — Yorkshire 

 Mem. Geol. Surv. 1892, p. 152. 



