304 Mr. F. Chapman on Foraminifera 



end. F, Cordaiy Reuss *, is near to F. striga in its general 

 outline, but it bears no double riblet on the shell-surface. 

 These vertical costulse are comparable with tlie same struc- 

 tures forming a marked feature in F. Fritschi, Perner f. 

 The latter species^ however^ belongs to the group with much 

 elongated tests, and I have never met with any intermediate 

 and broader specimens of F. Fritschi than those figured in 

 the paper dealing with the Frondicularice from the Gault of 

 Folkestone under the name of F. pinnaformis {=F. Fritschi, 

 Perner \) . 



The specimens recorded by G. P. Vine from the Cambridge 

 Grecnsand as " Frondicularia, var. with two parallel longi- 

 tudinal ribs/' may either belong to tliis present species or to 

 F. Fritschi. 



Three specimens of F. striga with fairly constant characters, 

 but all slightly broken, were found in the Cambridge Green- 

 sand of Swaff iiam. 



Frondicularia Archiaciana, d'Orbigny. 



Frondicidavia Archiaciana, d'Orbigny, 1840, Mem. Soe. geol. France, 

 vol. iv. p. 20, pi. i. tigs. 34-36 : Reuss, 1845, Verstein. bcilira. 

 Kreidef. pt. i. p. 31, pi. xiii. fig. 29 ; Chapman, 1894, Journ. R. 

 Micr. Soc. p. loo, pi. iii. fig. C. 



A broken specimen was found at Swaffham which bears 

 vertical stria? on its lateral surfaces similar to those found in 

 the Gault of Folkestone and the Chalk of Bohemia. 



Flabellina, d'Orbigny [1826]. 

 Flahellina didyma (Berthelin). 



Frondicularia didyma, Berthelin, 1880, M^m. Soc. geol. France, s^r. 3, 



vol. i. no. 6, p. Gl, pi. ii, figs. 18 a, b. 

 Flabellina didyma (Bertbeliu), Chapman, 1894, Journ. R. Micr. Soc. 



p. 159, pi. iv. fig. 7. 



One specimen from Swaffham. 



Phabdogonium, Peuss [I860]. 

 Bhahdogonium excavatum, Peuss. 



lihabdoffonium excavatum, Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. 

 "SVien, vol. xlvi. p. 91, pi. xii. fig. 8 ; Chapman, 1894, Journ. R. Micr. 

 Soc. p. 160, pi. iv. figs. 9 a, h. 



* Verstein. bcihrn. Kreidef. 1845, pt. i. p. 31, pi. viii. figs, 26-28, 

 pi. xiii. fig. 41. 



t " Foraminifery Cesk^ho Cenomanu " (Pal. Bohemias, no. 1), 1892, 

 p. 58, pi. vii. figs. 1 a-d. 



X Journ. R. Micr. Soc. 1894, p. 156, pi. iii. figs. 9-11. 



