Br. R. L. Sherlock — Foraminifera of Speeton Clay. 259 



Hils to the north-west of Berklingen, and it does not seem to have 

 been recorded since. 



horizon. — Found in Dg raid. Several specimens. 



Maegintjlina, d'Orbigny. 

 3Iarginulina linearis, Reuss. (PI. XVIII, Fig. 10.) 



Marginulina linearis, Reuss, 1862 : Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlvi, 



p. 60, pi. V, fig. 15. 

 M. linearis, Chapman, 1894 : Journ. Eoy. Micr. Soc, p. 161, pi. iv, fig. 14. 



Remarks. — Keuss' figure shows seven chambers and Chapman's 

 six, whereas the specimen found has only four. The species is 

 recorded from the Minimus-c\?ij of North Germany (Reuss), theGault 

 of Northern France (Berthelin) and Folkestone (Chapman). 



Sorizon. — Present in Upper C2. One specimen. 



Marff i?inlina fflabra, d^Orhignx. (PI. XVIII, Fig. 17.) 



Marginulina glah-a, d'Orbigny, 1826 : Ann. Sci. Nat., vol. vii, p. 259, No. 6 ; 



Modele No. 55. 

 M. inaqualis, Reuss, 1862 : Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlvi, p. 59, 



pi. V, fig. 13. 



Remarks. — The specimen is more curved than usual, but in other 

 respects agrees with M. glabra. The species is recorded from the 

 Mi?iimus-clay of Germany (Reuss), the Red Chalk of Speeton 

 (Burrows, Sherborn, & Bailey), the Folkestone Gault (Chapman), and 

 is still living (Brady) in both shallow and deep water. 



Horizon. — Found in B base c. One specimen. 



Margitiulina jo7iesi, Reuss. (PI. XVIII, Fig. 15.) 



Margimdina jonesi, Reuss, 1862 : Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlvi, 



p. 61, pi. v, fig. 19. 

 M. jonesi. Chapman, 1894 : Journ. Roy. Micr. Soc, p. 163, pi. iv, fig. 24. 



Remarks. — This is much the commonest species of 3larginulina in 

 the Speeton Clay, and is fairly abundant. The individuals differ 

 considerably, one specimen (in Dg) showing a passage to M. striato- 

 costata, Reuss, which Brady regards as synonymous with M. costata, 

 Batsch. In fact, M. jonesi is a mere variety of M. costata, characterized 

 by fewer and more marked ribs. Otlier specimens pass into M. robusta, 

 Reuss. M. jonesi has been recorded from the Upper Hils of Germany 

 and by Chapman from the Folkestone Gault. 



Horizon. — Found in B base b, Upper C2, and Dg mid. Fairly 

 abundant. 



Margitiulina debilis, Berthelin. (PL XVIII, Fig. 23.) 



Marginulina debilis, Berthelin, 1880 : Mem. Soc. geol. France, st^'r. Ill, vol. i, 



No. 5, p. 35, pi. iii, fig. 28. 

 M. debilis, Chapman, 1894 : Journ. Roy. Micr. Soc, p. 161, pi. iv, tig. 15. 



Remarks. — The only specimen found agrees with Chapman's figure 

 in possessing only five chambers. The species is known from the 

 Gault of France (Berthelin) and of Folkestone (Chapman). 



Horizon. — Found in Upper C2. One specimen. 



