228 Notices of Memoirs — Oolites of Northamptonshire. 



figured in that paper, but tliere are in some specimens crystals which 

 show all the principal appearances enumei'ated by Professor Judd, 

 aad which cannot, I think, be explained satisfactorily in any other 

 manner than that which he has eriven us. 



3<roTiOES OIF ivnEnvnozias- 



I. — The Oolitic Kocks at Stowe-nine-Churches, Northampton- 

 shire. By Beeby Thompson, F.G.S., etc. (Journ. North- 

 amptonshire Nat. Hist. Soc. Vol, VI.) 



IN this paper Mr. Thompson describes a section of especial interest, 

 as it shows the sequence of beds from the Northampton Sands 

 to the Oxford Clay. The tract near Stowe, situated about seven 

 miles west of Northampton, is a faulted one, and to this cause is due 

 the preservation of the Great Oolite and higher beds, which elsewhere 

 in the immediate neighbourhood have been removed by denudation. 

 The beds have been quarried chiefly to supply limestone for fluxing 

 purposes to the Heyford furnaces near by. 



The chief new points in this paper concern the identification of 

 the small area of beds overlying the Great Oolite, as these were 

 not indicated on the Geological Survey Map. The highest bed 

 beneath the Drift soil is a blue clay grouped as Oxford Clay. There 

 can be little doubt that this represents the clay usually found 

 between the Cornbrash and Kellaways rock, and sometimes 

 designated the Kellaways Clay. 



The Cornbrash contains some of the usual fossils met with in the 

 formation, and it rests on a series of beds grouped with the Forest 

 Marble and Great Oolite Clay. The presence of beds of flaggy 

 limestone resembling varieties of Forest Marble is of interest, as 

 they are only occasionally met with in the country to the north- 

 east of Bicester, in Oxfordshire. 



The Great Oolite Clay is not, as Mr. Thompson thinks, the bed to 

 which the term ' Cornbrash Clay ' has been applied ; that Clay, 

 Tivhere it occurs, overlies Cornbrash rock, partly replaces it, and 

 passes up into the Kellaways Clay. 



The Great Oolite Limestone and lower beds are described by Mr. 

 Thompson, and lists of fossils are given from these as well as from 

 the higher strata. A photographic plate and a plate of diagram- 

 sections illustrate the paper. H. B. W. 



II. — Notes on the Fossil Aphid^ and Tettigid^. 



I IN Mr. G. B. Buckton's late Monographs on British Aphides 

 , and Cicadce, are thoughtful remarks on the known fossil forms 

 of these two great families of Insects, and we here reproduce them 

 as interesting to our readers, — premising that these Insects belong 

 to the Homoptera, whose zoological relationship is as follows — 



Hemiptera : A. Homoptera : Aphides, Coccidce, Cicadce, Fulgo- 

 ridcB, etc. 



