Vol. 50.] MR. F. CHAPMAN ON THE BARGATE BEDS OF SURREY. 695 



one face of the test is fractured, showing the spiral of chambers 

 filled up completely with glauconite. 



From siliceous residue of Bargate limestone, Littleton. 



8. Haplophragmittm acutidorsattjm, Hantken. 



H. acutidorsatum, Hantken, Magyar Foldt. Tarsulat, vol. iv. 

 (1868) p. 82, pi. i. fig. 1 ; and Jahrb. ungar. geol. Anstalt, vol. iv. 

 (1875) p. 12, pi. i. fig. 1. 



The specimen from the Bargate series is quite typical in form, 

 but not in size : Hantken's specimens being from 1 to 2*5 mm. 

 in diameter, while the former is only 0*22 mm. The originally 

 described specimens were from the Hungarian Tertiaries. 



From clay of Bargate Pebble-beds, Littleton. 



9. Haplophragmittm neocomianum, sp. nov. (PI. XXXIV. fig. 2 a, b.) 

 Test arenaceous, thin, planospiral, and involute. The septation 



is obscure, but usually about nine chambers appear on the test- 

 surface ; the last chamber is sometimes slightly produced at the 

 outer angle. The surface of the test, which is nearly always of a 

 brown colour, is undulated. Aperture an arched slit situated at 

 the base of the terminal chamber. Diameter -^ in. (05 mm.). 



This species is nearly related to H. fontinense, 1 but the latter 

 species is arranged on an evolute plan. 



From clay-seams of Bargate Beds, Littleton (four specimens) ; 

 from clay of Pebble-beds, Halfpenny Lane, Chilworth (one speci- 

 men) ; and from clay-seams in Bargate Beds, Holloway Hill (thirteen 

 specimens). 



10. Haplophragmium nonioninoides, Beuss. 



H. nonioninoides, Reuss, Sitzungsb. Akad. Wissensch. Vfien, 

 vol. xlvi. (1862) p. 30, pi. i. fig. 8. 



Some of the specimens from the Bargate series of the above 

 species closely approach H. canariense (A. d'Orbigny's Nonionina 

 canariensis)' 2 in form — especially those which have the test con- 

 stricted at the sutures and the chambers well inflated. Dr. Reuss's 

 specimens of H. nonioninoides were obtained from the ' Flammen- 

 mergel ' and the ' Minimus-Thon ' of North Germany, beds which 

 are nearly the equivalent of the Gault in this country. It is also 

 a well-known foraminifer in the English Gault. 



One specimen from siliceous residue of Bargate limestone, and 

 nine from clay of Pebble-beds, Littleton ; one from Pebble-beds of 

 Halfpenny Lane, Chilworth ; and three from Bargate Beds, Holloway 

 Hill. 



11. Haplobhragmittm depressum, Jones. 



H. depressum, Jones, Quart. Journ. Geol. Soc. vol. xl. (1884) 

 p. 765, pi. xxxiv. fig. 2. 



This species was described by Prof. T. Rupert Jones from the 



1 Terquem, Mem. Acad. Imp. Metz (1870), p. 235, pi. xxiv. figs. 29, 30. 



2 D'Orbigny, ' Foram. lies Canaries,' 1839, p. 128, pi. ii. figs. 33, 34. 



