174 
LOWER OOLITIC ROCKS OF ENGLAND : 
fossiliferous beds of Weldon and Great Ponton,* which appear to 
be high in the Inferior Oolite Series. 
The stratigraphical evidence shows that there are various shelly 
horizons in the Lincolnshire Limestone ; thus the rag or shelly 
bed of Barnack is quite low in the series ; that of Weldon an 1 
the Great Ponton shell-bed are higher. It is possible that the 
fossils may in some places be remanie, as suggested by Mr. 
Hudleston; but it is very difficult to fix any definite subdivisions 
other than very local ones. 
The recorded occurrence in the Lincolnshire Limestone of such 
species as Ammonites subradiatus,su\d. A. Blagdeni; of Terelratula 
globata, T. spharoidalis, and Rhynchonella spinosa ; and of Ch/peus 
Ploti, suggest that the upper division of the Inferior Oolite is 
represented in some localities. More attention however needs to 
be given to the local stratigraphical horizons from which these 
fossils have been obtained. 
The principal beds in the Inferior Oolite Series (Lincolnshire 
Limestone, Collyvveston Slate, and Northampton Beds), may be 
roughly arranged as follows : 
Ponton Upper Shelly beds, Wansford, Ketton, Stamford, Casterton, 
Clipsham, Castle Bytham, and Ancaster freestones, Hibaldstow Beds . 
Ponton oolite and gasteropod-bed, Houghton freestone, Stamford Marble, 
Weldon freestone and shell-beds, Kirton clay-bed. 
Barnack Rag, Lincoln silver-bed, Kirton Beds. 
Collyweston Slate, Whittering Pendle. 
Duston Beds. 
List of Fossils recorded from the Lincolnshire Limestone : 
A&teracanthus ornatissimus. 
Strophodus. 
Ammonites Blagdeni. 
Murchisonae (Fig. 16). 
polyacanthus. 
subradiatus. 
Belemnites bessinus. 
Blainvillei. 
Nautilus polygonalis. 
Actseonina glabra. 
Alaria pontonis. 
Ataphrus (Monodonta) Isevigatus. 
Cerithium attritura. 
Beani. 
var. \veldonis. 
limaBforme, var. pontonis. 
wansfordiae. 
Cylindrites tnrriculatus. 
Littorina (Turbo) Phillipsi. 
Natica adducta. 
canaliculata. 
cincta. 
punctura. 
Nerinaea cingenda (Fig. 22). 
Nerinsea cotteswoldiaa. 
Eudesi, var. 
weldonis. 
Onustus ornatissimus. 
Patella Lnornata. 
Pleurotomaria armata. 
ornata. 
Bissoina obliquata. 
Trochotoma calix. 
Trochus spiratus. 
Area Pratti. 
Astarte elegans. 
excavata. 
minima. 
pontonis. 
rhomboidalis. 
Avicula braamburiensis (Fig. 13). 
inasquivalvis. 
Miinsteri. 
Cardium Buckmani. 
cognatum. 
Ceromya bajociana (Fig. 21). 
concentrica. 
Cucullaea cancellata. 
luf. Ool. Gasteropoda, pp. 196, 215. 
