INFERIOR OOLITE: LINCOLNSHIRE LIMESTONE. 171 
List of Fossils from the ColJyweston Slate : 
Pieh-remains. Lucina Wrighti. 
Belemnites bessiims. Macrodon hirsonensis. 
Alaria hamns, var. Phillipsi. Modiola gibbpsa. 
Malaptera (Pterocera) Bentleyi. sowerbyana (Fig. 10). 
Natica canalioulata. Myacites scarburgensis. 
cincta. Oetrea flabelloides. 
Patella rugosa. rugosa. 
Astarte elegans. Pecteii articulatus. 
excavata. demissus. 
Aviculabraamburiensi3(Fig. 13). lens. 
Miinsteri. paradoxus. 
Cardium Buckmani. personatus. 
cognatum. Perna rugosa. 
Ceromya bajociana (Fig. 21). Pholadomya fidicula. 
concentrica. Heraulti. 
Cucullasa cancellata. Pinna cuneata. 
cucullata. Placunopsis socialis. 
Gervillia acuta. Pteroperna coBtatula. 
Goniomya literata. plana. 
Hinnites abjectus. Trigonia oompta. 
tumidus. costata. 
Homomya crasBiuscula. hemisphserica. 
Lima pectiniformis. impressa. 
Lycetti ? Unicardium gibbosura. 
Lucina orbigniana. Phlebopteris polypodioides. 
The age of the LINCOLNSHIRE LIMESTONE was settled mainly 
through the labours of Samuel Sharp and Prof. Judd. The 
Rev. P. B. Brodie, in 1850, had published opinions on the 
Inferior Oolite age of certain beds near Grantham, a view sup- 
ported at the time by Lycett.* John Phillips in 1860 mentions 
the probable Inferior Oolite age of the Lincolnshire Oolite, but 
adopted (not without hesitation) a different correlation ; probably 
because the Yorkshire equivalents were then regarded as of 
Great Oolite age.t For the same reason, no doubt, the specimens 
collected by Mr. Howell from the Lincolnshire Limestone in the 
Northampton area, during the original Geological Survey of the 
district, were considered to be Great Oolite species. 
As pointed out by Prof. Judd, the chief difficulty seems to 
have arisen from the confusion between the Stonesfield Slate and 
the CoUyweston Slate, shared by Lonsdale, Morris, and Ibbetson, 
and adopted by Brodie; but Phillips had in 1835 rightly com- 
pared the CoUyweston and Whittering Slates with those of 
Brandsby in Yorkshire, and the Lincolnshire Oolite with the Grey 
Limestone of Scarborough. Subsequently Samuel Sharp of 
Dallington near Northampton, and Mr. Thomas Beesley of Ban- 
bury, were, by the study of the fossils in their respective areas, 
independently led to the conclusion that the Northampton Sand 
and Lincolnshire Oolite belonged to the Inferior Oolite. 
While studying the general relations of the Lincolnshire strata 
and the characters of their faunas, in 1866 and subsequent years, 
* Proc. Cotteswold Club, vol. i. pp. 55, &c. ; Kep. Brit. Assoc. for 1850, 
Sections, p. 74. 
t Quart. Journ. Geol. Soc., vol. xvi. pp. 17 (Address) and 119 ; see also Geol. 
Yorkshire, Part 1, ed. 2, pp. 3, 124. 
