648 
Transactions of the Society. 
Cristellaria liumilis Reuss, plate IX. fig. 7 a, b. 
C. liumilis Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, 
vol. xlvi. p. 65, plate vi. figs, 16, 17. 
This species varies in the relative width of the test, but it is easily 
recognized by the gentle curving of the shell, the numerous chambers, 
and the shelly thickening of the sutural lines. 
C. liumilis was found by Reuss in various beds of the Hils 
formation in North Germany. 
Found at Folkestone in zone i., specimen b, very rare ; zone ii., 
specimen b, very rare; zone xi., 50 ft. from the top, rare. 
Cristellaria crepidula Fichtel and Moll sp., plate IX. fig. 8 a, b. 
Nautilus crepidula Fichtel and Moll, 1803, Test. Micr., p. 107, 
plate xix. figs. g-i. Cristellaria crepidula d’Orbigny, 1839, Foram. 
Cuba, p. 64, plate viii. figs. 17, 18. C. laevigata Reuss, 1862, Sitz- 
ungsb. d. k. xVk. Wiss. Wien, vol. xlvi. p. 92, plate xii. fig. 14. 
C. Fittoni Berthelin, 1880, Mem. Soc. geol. France, ser. 3, vol. i. 
No. 5, p. 49. C. crepidula Brady, 1884, Chall. Rep., vol. ix. p. 542, 
plate lxvii. figs. 17, 19, 20 ; plate lxviii. figs. 1, 2. 
This species occurs in nearly all assemblages of Foraminifera from 
the Lias upwards. It was recorded by Reuss from the Gault of 
Folkestone under the name of C. laevigata i. Reuss’ name of C. laevigata 
was subsequently changed to C. Fittoni by M. Berthelin in his study 
of the French Gault, for the reason that the specific name laevigata 
had been previously used by d’Orbigny in 1826 for another type of 
Cristellaria. There is, however, no apparent cause for separating 
the Gault examples from the well-known species C. crepidula , for 
indeed, among the numerous varieties of Cristellariae bearing a 
general resemblance to the typical C. crepidula of Fichtel and Moll, 
this species here figured is the nearest, agreeing most minutely in all 
points with the type. C. Fittoni was recorded from the Gault of 
Montcley (Berthelin). 
C. crepidula has also been recorded from the Red Chalk of 
Speeton by Burrows, Sherborn and Bailey.* I am inclined to think, 
however, that their specimens more properly belong to C. complanata 
Reuss, since the sides of the tests are flat instead of gently convex as 
in the typical C. crepidula , and the commencing spiral more out- 
spread. 
C. crepidula has also occurred in the Neocomian beds of Littleton 
in Surrey (author’s MS.). It was found in the Gault of Folkestone 
in zone i., specimen b, very rare ; zone ii., specimen a, very rare ; 
zone xi., 6 ft. from the top, rare. 
* Jouru. Roy. Micr. Soc., 1890, p. 560, pi. ix. figs. 3, 4. 
