462 HE. Neaverson—Foraminifera of the Hartwell Clay. 
Localities: Wheatley, bed 2 (f.); Shotover Hill, bed 1 (z.) ; 
Bierton (v.r.). 
Frondicularia granulata Terquem. 
Frondicularia granulata Terquem, 1863; Mém. Ac. Imp. Metz., vol. xliv, 
p. 379, pl. vi, fig. 20. 
Only one specimen of this species was found in the beds under 
discussion. Previously F. granulata has only been recorded from 
the Lias (Terquem). 
Locality : Shotover Hill, bed 1 (v.t.). 
MarGinuLina d’Orbigny, 1826. 
_Marginulina Jonesi Reuss. 
Sater Jonest Reuss, 1862 ; Sitz. k. Akad. Wiss. Wien., vol. xlvi, p. 61, 
5 aileg IG), 
M. Jones Chapman, 1894; Journ. Roy. Micr. Soc., p. 163, pl. iv, fig. 24. 
M. Jonest Sherlock, 1914; Guor. Mac., p. 259, pl. xviii, fig. 15. 
The individuals of this form differ considerably with regard to 
the number of chambers, but on the whole agree well with the pub- 
lished figures. Sherlock regards M. Jonesi as “a mere variety of 
M. costata (Batsch) characterized by fewer and more marked ribs’, 
but he retains the specific name. Originally described from the 
Upper Hils of Germany (Reuss), it has since been found in the 
Gault of Folkestone (Chapman), the Speeton Clay of Yorkshire 
(Sherlock), and the Hartwell Clay (Chapman). 
Localities : Hartwell (a.); Bierten (r.) ; Long Crendon (v.r.) ; 
Wheatley and Shotover Hill, beds 1 and 2 (c.). 
Marginulina linearis Reuss. 
Marginulina linearis Reuss, 1862; Sitz. k. Akad. Wiss. Wien., vol. xlvi, 
p. 60, pl. v, fig. 15. 
M. linearis Chapman, 1894 ; Journ. Roy. Micr. Soc., p. 161, pl. vi, fig. 14. 
This form has been recorded from the Minimus-clay of North 
Germany (Reuss), the French Gault (Berthelin), Gault of Folkestone * 
(Chapman), and the Speeton Clay of Yorkshire (Sherlock). It 
occurs also in the Oxford Clay of Buckinghamshire (see later). 
Localities : Hartwell (r.) ; Shotover Hill, bed 1 (v.r.). 
VaGINULINA d’Orbigny, 1826. 
Vaginulina discors Koch. (PI. IX, Fig. 6.) | 
Vaginulina discors F. Koch, 1851 ; Palontoghrapica, vol. i, p. 172, pl. xxiv, 
figs. 1, 2. 
V. discors Reuss, 1862; Sitz. k. Akad. Wiss. Wien., vol. xlvi, p. 50, pl. iii, 
figs. 10-12. 
V. discors Chapman, 1894; Journ. Roy. Micr. Soc., p. 426, pl. viii, fig. 13. 
Chapman recorded V. discors from the Hartwell Clay in 1897. 
The specimens found by the present writer are characterized by 
depressed septal lines and striated segments, but they lack the 
strong longitudinal ribs which are shown in figures by Reuss and 
Chapman. ‘They differ in this respect also from V. sparszcostata 
Reuss. For the present, however, it seems advisable to retain them 
under the name V. discors, as they agree well with Chapman’s 
