1850.] STRICKLAND ON LECKHAMPTON HILL. 249 



Area lata. Placuna, n. s. 



, n. s. Pecten, several small species, two of 



Astarte depressa. wliicli are new. ' 



, two new species. Psammobia laevigata. 



Avicula, n. s. Trigonia, n. s. 



CucuUaea, four new species. Venus trapeziformis. 



Corbula, n. s. Cerithium, several new species. 



Corbis, n. s. Cylindrites, two new species. 



Cytherea, n. s. Emarginula, two new species. 



Donax ?, two new species. Fissurella, one new species. 



Gervillia, two new species. Nerinaea, n. s. 



Hiatella, n. s. Patella, two new species. 



Lima, n. s. Phasianella. 



Opis, n. s. Rostellaria, n. s. 



It will be observed that the bivalves generally preponderate over 

 the univalves, and the Gasteropoda are proportionally much less nu- 

 merous than they are in the Great Oolite at Minchinhampton. 



Among the Conchifera 38 "I are identical with Great Oolite* 



And of the Gasteropoda ... 15/ species. 



Total 53 species. 



The number of new species determined by Mr. Lycett amounts to 

 75. 



At the suggestion and with the sanction of Mr. Strickland, I ap- 

 pend his notes on the Leckhampton Section, which help much to 

 illustrate the preceding observations, and to which they form a valu- 

 able supplement. 



Notes on a Section of Leckhampton Hill. By H. E. Strick- 

 land, Esq., M.A., F.G.S. 



The well-known promontory of the Cotswolds, called Leckhamp- 

 ton Hill, affords probably the best locality in Gloucestershire for 

 studying the relative position of the various beds of the inferior 

 oolite and subjacent lias. From its great height and steepness, the 

 entire series of the oolite is admirably exposed to view, and the ex- 

 tensive quarries from which Cheltenham has been mainly built, afford 

 every facihty for examining the formation. The geologists of Chel- 

 tenham and the neighbourhood are well acquainted practically with 

 the subdivisions of the strata and their organic contents, but no exact 

 definitions or precise measurements of these strata have, I beHeve, ever 

 yet been made. Mr. Buckman's 'Chart' contains a section of Leck- 

 hampton Hill, and is valuable for its descriptions of the mineral cha- 

 racter and organic remains of some of the beds. But it does not at- 

 tempt to exhibit all the subdivisions of the oolite, or to show their 

 absolute and relative thicknesses. It appeared therefore desirable 

 that a more elaborate survey should be made, and with this object I 

 gladly availed myself of the aid of the Rev. A. D. Stacpoole of Ox- 



* Several of the small shells collected by Mr. Morris in the Barnack Rag, which 

 is considered to belong to the Great Oolite, are identical with some in the list 

 above given. 



