Dr. R. L. Sherlock — Foraminifera of Speeton Clay. 263 



Cristellaria sternalis, Eerthelin. (PI. XIX, Fig. 3.) 



Cristellaria sternalis, Berthelin, 1880 : Mem. Soc. geol. France, ser. ill, vol. i, 



No. 5, p. 54, pi. iii, figs. 2a, b. 

 C. sternalis, Chapman, 1896 : Journ. Koy. Micr. Soc, p. 8, pi. ii, figs, la, h. 



Remarks. — The only specimen found has a snaaller keel than the 

 one figured by Chapman. The species is known from the Gault of 

 Northern France and Folkestone. 



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



Cristellaria orhiculata (Roemer). (PI. XIX, Fig. 6.) 

 Planularia orhiculata, Eoemer, 1842 : Neues Jahrbueh, p. 278, pi. viiB, fig. 6. 



Remarks. — Described by Roemer from the Hils Clay of Escherhausen, 

 which Reuss (Sitzungsb. d. k. Ak, Wiss. Wien, vol. xlvi, p. 8, 1862) 

 thinks is probably the iSpeeton Clay of his classification ; it does not 

 seem to have been found since. 



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



Cristellaria rotulata (Lamarck). (PI. XVIII, Fig. 25.) 



Lenticulites rotulata, Lamarck, 1804 : Annales de Mus(5um, vol. v, p. 188, 



No. 3; Tableau Encycl. et Meth., pi. cccclxvi, fig. 5. 

 Cristellaria mUnsteri, Eeuss, 1862: Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlvi, 



p. 77, pi. ix, figs. 3a, b, ia, b. 

 C. rotulata, Brady, 1881 : Chall. Eep., vol. ix, p. 547, pi. Ixix, figs. 13a, b. 



Remarks. — This is by far the commonest species of Cristellaria in 

 the Speeton Clay of Yorkshire, and, with the exception of Pulvinulina 

 caracoUa, is much the commonest of all the Foraminifera in that 

 formation. A few specimens are doubtfully referred to C. rotulata, 

 var. macrodiscus, Reuss (Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlvi, 

 p. 78, pi. ix, figs, ba, h, 1862). 



C. rotulata is known from the Middle and Upper Hils and the 

 Speeton Clay of North Germany (Reuss), from the Red Chalk of 

 Speeton, the Gault of Folkestone and Northern France, and many 

 other Cretaceous deposits, atid probably ranges back as far as the 

 Ordovician System (IJlrich, Journ. Cincin. Soc. Nat. Hist., vol. v, 

 p. 119, pi. V, figs. 2, 2ff, 1882(?)). It is still common in many parts 

 of the world, and is found at all depths (Brady). 



Horizon. — Present in B base b, B base c, Ci, C2, C3, Cg, Do, D,;. 

 Abundant. 



Sub-family POLYMORPHIN^. 



PoLYMOKPHiNA, d'Orbiguy. 



Pohjmorphinafusiformis, Roemer. (PI. XIX, Fig. 12.) 



Polymorphina [Glohulina) fiisiformis, Koemer, 1838 : Neues Jahrb. fiir Min. , 



p. 386, pi. iii, fig. 37. 

 P. (G.) angusta, Egger, 1857: Neues Jahrb. fiir Min., p. 290, pi. xiii, figs. 13-15. 

 1'. lanceolata, Reuss, 1851: Zeitschr. d. deutsch. geol. Gesell., vol. iii, p. 83, 



pi. vi, fig. 50. 

 Globulina prisca, Reuss, 1862: Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlvi, 



p. 79, pi. ix, fig. 8. 

 Polymorphina fusiformis, Brady, Parker, & Jones, 1870 : Trans. Linn. Soc, 



vol. xxvii, p. 219, pi. xxxix, figs. 5a-c, and woodcut e, p. 220. 



