SUPPLEMENTAL NOTES. 
85 
Patellina concava (Lamarck) *. Cenomanian : Dept. Sarthe, France. 
plana (d’Archiac) t- Cenomanian : Fouras, Dept. Charente-Inferieure. 
mamillata (d’Arch.) J. Cenomanian : Fouras. 
conica (d’Arch.) §. Cenomanian : Fomas &c. 
conoidea (Gras) ||. Upper Neocomian. 
discoidea (Gras) *[[. Aptian : les Ravix, la Fa, le Rimet, Dept, l’lsere. 
? gigantea (d’Orb.) **. A concavo-convex form; 10 centimetres broad. 
Senonian (Cbalk) : Royan a.nd Perignac, Dept. Charente-Inferieure. 
spp., Carter tt- Cretaceous (?) ; S.E. coast of Arabia. Tertiary ; 
Sinde, and the Valley of Kelat in Beloochistan. 
Conulites Cooki, Carter tt- Tertiary : Scinde and Valley of Kelat. 
Patellina plana (d’Arch.) and P. discoidea (Gras) are probably one and the 
same Hat variety of P. lenticularis ; and P. mamillata (d’Arch.), P. conica 
(d’Arch.), and P. conoidea (Gras) are possibly the same as P. concava (Lam.). 
Quenstedt in his ‘ Petrefaktenkunde ’ &c. refers to Patellina ( Orbitulites ) lenti- 
cidaris, p. 357, pi. 155. f. 64, from the u Gault,” Perte-du-Rkone ; Patellina 
( Orbitulites ) concava, p. 359, pi. 155. f. 65, from the “ Chloritic Chalk,” Es- 
cragnolles. 
V. F 0 R AMINIFE R A OF THE CHALK OF ENGLAND. 
(See pages 10-16.) 
The Foraminifera of the Chalk are so easily obtained in England, and so 
many English specimens from the Chalk-marl and the Chalk are in the British 
Museum, that it has been thought advisable to give a full list of the known 
species, and to indicate therein those which are now in the National Collection. 
This list of species, preceded by some general remarks on the constitution of 
Chalk, here follows : — 
Note on the Foraminifera of the Chalk. By T. Rtjpekt Jones, F.R.S. 
Chiefly from the second edition of Dixon’s ‘ Geology of Sussex,’ 1878. 
Foraminifera are very abundant in the Chalk ; indeed they constitute a large 
proportion of its material ; Mr. H. C. Sorby, F.R.S. , has estimated that in some 
specimens of chalk the shells and fragments of Globigerinxz form 90 per cent, of 
the bulk. Coccoliths §§, and sometimes Rhabdoliths, which are still smaller cal- 
careous organisms, form the finer material of the Chalk. The microscopic prisms 
of Piocerawws-shells sometimes occur in such abundance as to make up a large 
proportion of the Chalk in places ; and Sponge-spicules often abound. Forami- 
nifers and Coccoliths are always present. The former belong to such kinds as 
at the present day live in the sea, from shallow water, near the shore, down 
to depths of about 100 fathoms. Some of them, however, exist now at great 
* Hist. Anim. s. Vert. vol. ii. p. 197. no. 4 (1816) ; Ann. & Mag. Nat. Hist. ser. 3, 
vol. vi. p. 37 (1860). 
t Mem. Soc. Geol. France, vol. ii. 1837, p. 178. 
j Op. cit. 
§ Mem. Soc. Geol. France, vol. ii. 1837, p. 178. 
|| Catal. Corps organis. foss. Dept, de lTsere, par M. Albin Gras. 8vo, Grenoble, 
1852, pp. 33 & 37, pi. 1. figs. 4-6. 
Op. cit. pp. 37 & 52, pi. 1. figs. 7-9. 
** Prodrome de Paleontologie stratigraphique, vol. ii. (1850), p. 279. no. 1350 
Ann. & Mag. Nat. Hist. July 1860, p. 35. 
tt Ann. & Mag. Nat. Hist. ser. 3, vol. viii. pp. 459 &c. 
Ann. & Mag. Nat. Hist. ser. 3, vol. viii. p. 457, pi. 15. fig. 7. 
§§ One form of Coccoliths, termed Discoliths by Huxley, was observed and figured 
by the late Rev. J. Reade in Mantel? s ‘Wonders of Geology,’ 1st edit., and p. 953, 7th 
edit. 
