264 Dr. R. L. Sherlock — Foraminifera of Speeton Clay. 



Remarks. — Brady has subdivided this species again into P. angusta, 

 Egger, and P. lanceolata, Reuss (Cliall, Rep., vol. ix, p. 563, 1884), 

 but Chapman reunites tliem (Journ. Roy. Micr. Soc, 1896, p. 11, pi, ii, 

 fig. 9). A number of specimens have been found, and they show 

 transitional stages between the types recognized bj^ Brady. The 

 form is recorded by Reuss fi'om the Upper Hils and the Ifmimus-claj 

 of Germany, by Berthelin (Mem. Soc. geol. France, ser. iii, vol. i, 

 p. 57, pi. iv, figs. 20a, b, 1880) from the French Gault, and by 

 Chapman from the Gault of Folkestone. Burrows, Sherborn, & Bailey 

 record it as P. lactea in the Red Chalk (Journ. Roy. Micr. Soc, 1890, 

 p. 561), and it is still living. Brady states that it ranges down to 

 2,400 fathoms. 



Sorizon. — Fairly abundant in Upper Cs; a single specimen in 

 B base c. 



Polymorphma prollema, d'Qrbigny. (PI. XIX, Fig. 13.) 



Polymorphina (GuUulina) problema, d'Orbigny, 1826 : Ann. Sci. Nat., vol. vii, 



p. 266, No. 14; Modele No. 61. 

 P. (G.) communis, d'Orbigny, loc. cit., p. 266, pi. xii, figs. 1-4 ; Modele No. 62. 

 P. problema, Brady, 1884 : Chall. Eep., vol. ix, p. 568, pi. Ixxii, figs. 19, 20 ; 



pi. Ixxiii, fig. 1. 



Remarks. — The species is recorded by Chapman {P. communis) from 

 the Gault of Folkestone (Journ. Roy. Micr. Soc, 1896, p. 13, pl. ii, 

 fig. 15) and the Lower Cretaceous of Surrey (Q.-J.G.S., vol. 1, 

 p. 716, 1894); by Berthelin from the Gault of France, as 

 P. cretacea (Mem. Soc. geol. France, ser. iir, vol. i, p. 58, 1880), and 

 from the Red Chalk of Speeton, as P. gihha, by Burrows, Sherborn, 

 and Bailey (Journ. lioy. Micr. Soc, 1890, p. 561), and it is still living. 

 The greatest depth from which it was recorded by the Challenger 

 Expedition was 155 fathoms. 



Horizon. — Present in Upper C2. One specimen. 



EXPLANATION OF PLATE XVni. 



All figures are magnified 50 diameters except Fig. 25. 



Fig. 1. Eeophax scorpiurus, Montfort. 

 2. Bigenerina nodosaria, d'Orb. 



?j. Haplopliragmium latidorsatum (Bornemann). 3a, lateral aspect ; 

 36, oral aspect. 



4. Gaudryina filiformis, Berthelin. 



5. Ammcdiscus gordialis (Jones & Parker). 



6. Lageno. globosa (Montagu). 



7. Nodosaria (Dentalina) fontannesi, Berthelin. 



8. Lagena apiculata, Eeuss, var. danfordi, var. nov. 



9. Nodosaria [Dentalina) roemeri, Neugeboren. 



10. Marginulina linearis, Eeuss. 



11. Nodosaria (Glandulina) IcBvigata, d'Orb., var. strobilus, Eeuss. 



12. Lagena apiculata, Eeuss. 



13. Nodosaria (Dentalina) lorneiana, d'Orb. 



14. Lagena IcBvis (Montagu). 



15. Marginulina jonesi, Eeuss. 



16. Nodosaria caloviorpha, Eeuss. 



17. Marginulina glabra, d'Orb. 



18. Nodosaria hispida, d'Orb. Broken specimen. 



19. N. (Dentalina) siliqua(?), Eeuss. Broken specimen. 



