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



recognition of the kindly assistance he has always given me in work 

 on the Foraminifera. 



Horizon. — Found in B base c and Upper C2. Fairly abundant at 

 both horizons. 



Cristellaria crepidula (Fichtel & Moll). (PL XIX, Fig. 8.) 



Nautilus crepidula, Fichtel & Moll, 1803 : Test. Micr., p. 107, pi. xix, figs. g-i. 

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



p. 70, pi. vii, fig. 14. 

 G. crepidula, Brady, 1884 : Chall. Eep., vol. ix, p. 542, pi. Ixvii, figs. 17, 19, 20 ; 



pi. Ixviii, figs. 1, 2. 

 G. crepidula, Jos. Wright, 1886 : Proc. Belfast Nat. Field Club, App., p. 331, 

 pi. xxvii, fig. 4. 



Remarkn. — The species ranges from the Lias to Recent. It is ' 

 recorded (as C. grata) by Reuss from the Upper Hils and the 

 J/^V^^»^MS-clay of Germany, from the Folkestone Gault by Chapman, 

 the Red Chalk of Speeton by Burro v^s, Sherborn, & Bailey, and from 

 the Bargate Beds (Lower Cretaceous) of Surrey by Chapman. One 

 specimen agrees most closely with Wright's figure quoted above. 



Horizon. — Found in B base c (a few specimens) and one specimen 

 from Upper Cg. 



Cristellaria turgidula, Reuss. (PI. XIX, Fig. 1.) 

 Gristellaria turgidula, Eeuss, 1862 : Sitzungsb. d. k. Ak. Wiss. Wien, 



vol. xlvi, p. 73, pi. viii, figs. 4a, b. 

 C. ingenua, Berthelin, 1880 : Mem. Soc. g^ol. France, ser. iii, vol. i, No. 5, 



p. 54, pi. iii, figs. 20, 21. 

 G. turgidula, Chapman, 1896 : Journ. Eoy. Micr. Soc, p. 1, pi. i, fig. 1. 



Remarks. — The form is recorded by Reuss from the Milletianus- and 

 J/ewm«<s-clays of Germany, and from the Gault of Northern France 

 and Folkestone by Berthelin and Cha|)man. 



Horizon. — Present in Cj and Upper C2. One specimen from Cj^, 

 two from C2. 



Cristellaria cuUrata (Montfort). (PI. XIX, Fig. 4.) 



Bobulus cultratus, Montfort, 1808 : Conchyl. Systeme, vol. i, p. 214, 54^ genre. 

 Gristellaria cultrata, Brady, 1884 : Chall. Eep., vol. ix, p. 550, pi. Ixx, figs. 4-6. 



Remarks. — A specimen from D2 base is intermediate between 

 C. cultrata and C. rotulata. The species is known from the Lias and 

 successive formations to Recent times. Brady states that, as a rule, 

 C. cultrata is rarely met with at a depth of less than 100 fathoms. 



Horizon. — Found in Dg mid and ? D2 base. One specimen in 

 each case. 



Cristellaria gauUina, Berthelin. (PL XVIII, Fig. 27.) 

 Cristellaria gaidti7ia, Berthelin, 1880: Mem. Soc. geol. France, ser. iii, vol. i, 



No. 5, p. 49, pi. iii, figs. 15-19. 

 C. gaultina. Chapman, 1896 : Journ. Eoy. Micr. Soc, p. 7, pi. i, figs. 10a, h, 11. 



Remarks. — The species has been recorded from the Gault of Northern 

 France and Folkestone by Berthelin and Chapman. According to 

 Chapman the C. cultrata of the Red Chalk of Speeton belongs to 

 this species. 



Horizon. — Present in B base c and Dg mid. One specimen in 

 each bed. 



