CRETACEOUS SERIES IN LINCOLNSniRE AND YORKSHIRE. 343 



When I saw this exposure I had not recognized the constant 

 succession of the beds of the Lower Chalk to which I have drawn 

 attention, and I have been unable to visit the locality again. A 

 large Ammonite occurred above the grey-coloured bed, and Ilolaster 

 rotundus (sp. nov.), which will be described in the sequel, occurred 

 just above the jjink band. 



Between Ganton and Speeton I have seen no exposure in the 

 Lower Chalk, and my linal section in this division is in the grand 

 cliifs east of Speeton Gap, where the whole can be seen. The 

 section of these cliffs about to be described commences 800 yards 

 east of the mouth of Speeton Beck, near a spot marked on the map 

 of the Ordnance Survey as " Nanny Goat's House." For the con- 

 venience of reference only I have divided the chalk into beds, 

 which are numbered from the base upwards, the Bed Chalk or Hun- 

 stanton Limestone already described being bed 1.* 



Bed 2. Thickness 10 feet. At the base of the cliff, at the point 

 indicated, is a bed of bluish-grey nodular chalk. Only about 5 feet 

 of it forms part of the cliff face, but under favourable conditions of 

 the shingle on the beach it may be seen to be about 10 feet thick. 



During the past summer (1887) I saw beneath this bed a strip of 

 smooth Bed Chalk containing Belemnites, and agreeing in appear- 

 ance with the Hunstanton Limestone. I was unable to clear away the 

 shingle and boulders sufficiently to see the junction of the two beds, 

 but I feel sure that the bluish- grey chalk is the actual upward con- 

 tinuation of the section above bed 1. In several subsequent visits, 

 this part of bed 2 was covered by shingle and seaweed to a consider- 

 able depth. 



The chalk of Bed 2 seemed to me rather smoother near its base, 

 but it passed up into the rough and very lumpy chalk of the bed 

 above. The lowest part near Bed 1 contained Belemnites minimus. 



Bed 3. Thickness 28 feet. Like the central part of bed 1, the 

 base of this bed consists of calcareous potato-like lumps in a marly 

 matrix, the marly element being, however, less evident. The nodular 

 character is less pronounced near the top, and above the lower third 

 of the bed discontinuous layers of smoother chalk occur, a foot or 

 more in thickness. 



The first 8 feet above the base is of a brick-red colour, perhaps a 

 shade pinker than bed 1 ; in the succeeding 5| feet it appears to be 

 only the marl separating the lumps or nodules which is coloured 

 pinkish purple ; about 4 feet higher the colour dies away entirely. 

 After an interval of 7| feet the colour reappears, and this forms the 

 middle pink band noted by Prof. Wiltshire and Prof. J. E. Blake (see 

 also " Coloured Bands," p. 353). 



The whole of this bed is divided into courses by bands of marl, 

 some of which are two or three inches thick, greenish-grey or red 

 in colour, according to position. No Belemnites occur ; Avicula gry- 

 phceoides is the common fossil, very abundant in the base, gradually 

 disappearing in the higher part, above which I have not met with it. 



Bed 4. Thickness estimated at 39 feet. Its base is somewhat 

 * See Section VI. page 366. 



