R. F. Tomes — Inferior Oolite Madreporaria. 387 



from the few small corals which are found in the Upper Lias, though 

 not nearly so much from those species which occur in the under- 

 lying Marlstone. The following are such as have up to this time 

 been taken from the Pisolite, and the beds below it. 



Montlivaltia concinna. — Pisolite at Crickley and Leekhampton, 

 and in the broken-np bottom beds at Huddiknoll, near the 

 Horsepools, Gloucester. 



Montlivaltia cupuliformis. — Beds under the Pisolite, Crickley. 



Montlivaltia de la Bechei. — Bed under the equivalent of the 

 Pisolite, Frocester Hill. 



Montlivaltia lens. — Beds under the Pisolite at Leekhampton 

 and Crickley, and in the beds overlying the Upper Lias sands, 

 Dover's Hill, Chipping Campden. 



Isastr^ia, an undetermined species. — Bed under Pisolite, Crickley. 



Chorisastr^ja, sp. — Pisolite, Crickley, and the bed overlying the 

 Upper Lias sands, Dover's Hill, Chipping Campden. 



Thamnastr^a, sp. — Pisolite, Crickley. 



Thamnastr^a, sp. — Bed overlying the Upper Lias Sands, Dover's 

 Hill, Chipping Campden. 



Oroseris Oolitica. — Bed under the Pisolite, Crickley. 



Comoseris vermicularis. — Pisolite ? Crickley. 



Several of the above are either undeterminable or have already 

 been passed under review, but mention will hereafter be made of some 

 of them in the notes on the species. 



Mr. Witchell, in his valuable work on the Geology of Stroud, 

 records the occurrence of a Coral-bed resting on the Upper Trigonia 

 Grit. The position being wholly at variance with that assigned to 

 the Upper Coral-bed near Cheltenham by the late Dr. Wright, I 

 have recently visited Stroud, and, under the guidance of Mr. Witchell, 

 have examined one of the sections mentioned by him — the Stroud 

 Hill section. The result has been the full confirmation of his 

 opinion, that there are four coralliferous deposits in the Inferior 

 Oolite of Gloucestershire, instead of three as stated by the late Dr. 

 Wright. The Coral-bed exposed in Worden's quarry in the Slad 

 Valley, Stroud, though supposed by Dr. Wright to correspond with 

 the upper one near Cheltenham, is really of more recent date, and is 

 indeed the same as the one in the Rodborough Hill and Stroud Hill 

 sections. The position of these four coralliferous layers in the Inferior 

 Oolite of Gloucestershire may be defined as follows : — 



1. The Upper Coral Bed. — Occurs in the upper part of the Upper Trigonia Grit, 



and is exposed at Eodborough Hill, Stroud Hill, and in the Slad Valley, near 

 Stroud. 



2. The Second Coral Bed. — Lies in the bottom of the Lower Trigonia Grit, and is 



exposed at Cleeve Hill, Leekhampton Hill, Ravensgate Hill, Brown's Hill near 

 Seven Springs, Juniper Hill near Painswick, and at Birdlip, all localities in 

 the Cheltenham district. 



3. The Third Coral Bed. - Lies in the Oolite Marl at Birdlip Hill, Leekhamp- 



ton Hill, Juniper Hill, and at Notgrove on the Cheltenham and Chipping 

 Norton Railway. 



4. The Fourth Coral Bed. — Lies directly upon the Pisolite, and is well exposed 



at Crickley Hill, Birdlip Hill, Sheepscomhe, the Horsepools, at Huddiknoll, 

 and at Juniper Hill near Painswick. It is absent at Cleeve Hill and at the 

 Leekhampton and Frocester Hills. 



