E. Neaverson—Foraminifera of the Hartwell Clay. 461 
This is the most widely distributed species of Nodosaria in the 
Hartwell Clay, occurring at all the localities except Aylesbury. 
It is recerded by H. B. Woodward as Nodosaria cf. raphanistrum 
[Linn.], and the specimens in Aylesbury Museum from the collection 
of the late Dr. Lee, of Hartwell House, have this label. Chapman 
records the form as NV. raphanus from Hartwell. It ranges from the 
Lias and occurs at the present day at depths down to 1,400 fathoms 
(Brady). . 
Localities : Hartwell (c.); Bierton (r.); Whitchurch (r.) ; 
Long Crendon (a.); Wheatley and Shotover Hill, bed 2 (a.), 
bed 1 (r.). 
Nodosaria seminuda Reuss. (Pl. IX, Fig. 1.) 
Dentalina seminuda Reuss, 1850 ; Denkschr. Akad. Wiss. Wien., vol. i, p. 367, 
als sdhyits ayers oh 
Nodosaria seminuda Bagg, 1912; U.S. Geol. Surv., Bull. 513, p. 59, pl. xvi, 
fig. 3. 
A single well-developed specimen shows similarity with 
N. seminuda Reuss. The lower portion of the test is costate, the 
later chambers smooth ; the early septa are hardly visible, but the 
later part of the test is more constricted, the last chamber being 
almost globular. The species is therefore a catagenetic form, 
showing loss of ornament (costate to smooth). It lives at present 
in the Caribbean Sea (Bagg), and does not appear to have been 
recorded below the Tertiary. 
Locality : Hartwell (v.r.). 
Nodosaria (Gl.) humilis Roemer. (PI. IX, Figs. 2, 3.) 
N. humilis Roemer, 1841; Verst. norddeutsch. Kreide, p. 95, pl. xv, fig. 6. 
N. humilis Chapman, 1893; Journ. Roy. Micr. Soc., p. 585, pl. viii, fig. 18. 
This form is very variable in its distribution at different localities. 
All specimens from Hartwell preserve a regularly conical outline due 
to the feeble inflation of the segments ; in certain individuals which 
are much longer, a greater number of chambers is developed. than in 
the type. WN. (G!.) humilis has been recorded from the Upper Hils 
Clay, the Speeton Clay, and Gault of North Germany (Roemer, 
Reuss), from the Gault of Folkestone (Chapman), and the Gault of 
France (Berthelin), as well as from later deposits. 
Localities : Hartwell (c.) ; Long Crendon (c.) ; Wheatley, bed 2 
(v.r.). 
Fronvicunaria Defrance, 1824. 
Frondicularia concinna Koch. (Pl. IX, Fig. 5.) 
Rare ularie concinna Koch, 1851 ; Palewontographica, vol. i, p. 172, pl. xxiv, 
g. 5. 
F, concinna Reuss, 1862; Sitz. k. Akad. Wiss. Wien., vol. xlvi, p. 54, pl. iv, 
fig. 13: 
The Hartwell Clay specimens differ from the previously figured 
specimens in that the greatest width is nearer the initial end, and the 
outline is more irregular. F. concinna is recorded from the Upper 
Hils and Speeton Clay of Germany (Reuss). 
