Arthur Burnet — The Upper Chalk of North, Lincolnshire. 173 



suggested to me that I should try and obtain fossils from the 

 intermediate pits, and thus extend tlie work commenced by Mr. Hill. 

 As the result of visits to about thirty pits, ranging from near 

 Louth to Barrow-on-Humber, I have obtained further evidence of 

 tlie zone of Holnster planus, and also some indications of the zone 

 of Micraster cortestudinariiim. 



I was unable to find any other sections showing beds which 

 could be regarded as the exact equivalent of those seen at Bosvvell. 

 These latter probably belong to the lowest part of the Ilolaster 

 planus zone, and the paleeontological evidence now available seems 

 to show that the outcrop of the base of this zone lies further west 

 than was originally supposed to be the case. In the quarry at 

 Boswell (from which Mr. Hill obtained Holaster jylanns, Micraster 

 Lesltei, and Anancliytes sciitatus) I found a good specimen of Holaster 

 placenta and a Micraster (species doubtful). 



The quarry at Acthorpe, a mile and a half north-west of Louth, 

 is the most southerly point in Lincolnshire from which Upper 

 Chalk fossils have been obtained. There I found the following : — 

 Inoceramiis Cuvieri, Bhynclionella limbata, Jtliynclionella Cuvieri, and 

 Terebratida carnea. Infulaster eccentricus, EcMnoconus globulus, and 

 Bhynclionella limhata had been previously found here by Mr. Ehodes, 

 of the Geological Survey. 



The beds exposed in the quai-ry three-quarters of a mile west- 

 south-west of Fotherby are typical of those seen in most of the 

 pits to be afterwards mentioned in this article. The section is as 

 follows : — ^ 



it. in. 



Broken white chalk 4 



Layer of grey fuller's earth ... 3 



Hard white chalk with flint nodules 6 



Course of continuous ilint ... ... ... 6 



Hard creamy chalk without flints ... ... 8 6 



Here I found several fossils, viz. : — 



Serpula, sp. (small spiral). Mhynchonella Cuvieri. 



Ilolaster planus. Ostrea normaniana. 



,, placenta. ,, vesicularis. 



Go7iiaster (ossicle) . ,, sp. 



Cyphosoma (spine). Inoceramus Brongniarti ? 



Terehratula carnea. Plicatula sigilKna. 



Terehratnlina lata. Septifer lineatus. 

 Kingena lima. 



A pit near Fotherby Grange, and about three-quarters of a mile 

 north of the above, yielded the following : — 



Serpula, sp. (small spiral). Ehtjnclionella Cuvieri. 



Terehratula carnea. Ilolaster planus ? 



Terehratulina lata. 



A pit half a mile north-west of Lambcroft shows white chalk 

 with flint bands of a peculiar nature, the flint being intermingled 

 with lumps of white chalk. I found here Bhynclionella Cuvieri,. 

 Kingena lima, and a spine of Cidaris perornata. 



1 "Geology of part of East Lincolnshire," p. 69. 



