from the (i Cambridge Greensand." 307 



Vaginulina truncata, Reuss. 



Vaginulina truncate, Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, 

 vol. xlvi. p. 47, pi. iii. fig. 9 ; Chapman, 1894, Journ. R. Micr. Soc. 

 pp. 423, 424, pi. viii. figs. 5 a, b, 6. 



It is difficult to define the limits of the type form of this 

 species, for it passes so insensibly into the robust variety with 

 the redundant shell-growth. Variations of V. truncata, in 

 which the later segments are Frondicularian, are met with in 

 the Cambridge Greensand, similar to those which were found 

 in the Gault of Folkestone *. 



V. truncata is very common at Swaffham. 



Vaginulina truncata, Reuss, var. robusta, 

 Berthelin & Chapman. 



Vaginulina truncata, Reuss, " var. tres robuste," Berthelin, 1880, Mem. 



Soc. geol. France, ser. 3, vol. i. no. 5, p. 40, pi. ii. figs. 4 a, b. 

 Vaginulina truncata, Reuss, var. robusta, Chapman, 1894, Journ. R. 



Micr. Soc. pp. 424, 425, pi. viii. figs. 7 a, b. 



This variety is equally abundant with the type form at 

 Swaffham. 



Vaginulina truncata, var. eurynota, Reuss. 



Vaginulina eurynota, Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, 

 vol. xlvi. p. 90, pi. xii. fig. 9 ; Burrows, Sherborn, and Bailey, 1890, 

 Journ. R. Micr. Soc. p. 559, pi. x. fig. 9. 



In the Gault series this curved form of Vaginulina was 

 found to graduate into what may be regarded as the type 

 form — V. truncata — and was included under that name in 

 the descriptive papers on the Folkestone Foraminifera. An 

 extremely good specimen of this variation was found in the 

 Cambridge Greensand of Swaffham, and is here regarded as a 

 variety of V. truncata. 



Vaginulina arguta, Reuss. 



Vaginulina arguta, Reuss, 1860, Sitzungsb. d. k. Ak. Wiss. Wien, 

 vol. xl. p. 202, pi. viii. fig. 4 ; Chapman, 1894, Journ. R. Micr. Soc. 

 p. 425, pi. viii. figs. 9 a, b. 



One specimen from Swaffham. 



Vaginulina striolata, Reuss. 



Vaginulina striolata, Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, 

 vol. xlvi. p. 46, pi. iii. fig. 7 ; Chapman, 1894, Journ. R. Micr. Soc. 

 pp. 425, 426, pi. viii. fig. 10. 



This species was represented in the series from the Upper 



* Cf. Journ. R. Micr. Soc. 1898, p. 14, pi. ii. fig. 13 



23* 



