from the " Cambridge Greensand." 309 



Cristellaria crepidula (Fichtel & Moll). 



Nautilus crepidula, Fichtel & Moll, 1798, Test. Micr. p. 107, pi. xix. 



figs. ff-i. 

 Cristellaria crepidula (Fichtel & Moll), d'Orbigny, 1839, Foram. Cuba, 



p. 64, pi. viii. figs. 17, 18; Chapman, 1894, Journ. R. Micr. Soc. 



p. 648, pi. ix. figs. 8 a, b. 



One specimen from Swaffham. 



Cristellaria gladius (Philippi) . 



Marginulina gladius, Philippi, 1843, Beitr. z. Kenntniss d. Tertiarf. 



nordwest. Deutschl. p. 40, pi. i. fig. 37. 

 Cristellaria gladius (Philippi), Hantken, 1875, Mittheil. a. d. Jahrb. k. 



ungar. geol. Anstalt, p. 51, pi. v. fig. 12 ; Chapman, 1894, Journ. R. 



Micr. Soc. p. 649, pi. ix. figs. 11 a, b. 



Two very typical specimens from Swaffham. 



Cristellaria Bronni (Romer). 



Planularia Bronni, Romer, 1841, Verstein. d. nordd. Kreidegeb. p. 97, 



pi. xv. fig. 14. 

 Cristellaria Bronni (Romer), Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. 



Wien, vol. xlvi. p. 70, pi. vii. tigs. 13 a, b ; Chapman, 1894, Journ. 



R. Micr. Soc. pp. 649, 650, pi. ix. figs. 12 a, b, 13 a, b. 



One slightly damaged specimen from Swaffham. 



Cristellaria sulcifera, Reuss. 



Cristellaria sulcifera, Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, 

 vol. xlvi. pp. 74, 93, pi. viii. figs. 8 a, b; Chapman, 1894, Journ. R. 

 Micr. Soc. pp. 650, 651, pi. x. figs. 2 a, b. 



Rare at Swaffham. 



Cristellaria triangularis, d'Orbigny. 



Cristellaria triangularis, d'Orbigny, 1840, Mem. Soc. g6ol. France, 

 ser. 1, vol. iv. p. 27, pi. ii. figs. 21, 22 ; Chapman, 1894, Journ. R. 

 Micr. Soc. p. 651, pi. x. figs. 3 a, b. 



One characteristic specimen from Swaffham. 



Cristellaria trunculata, Berthelin. 



Cristellaria trunculata (pars), Berthelin, 1880, Mem. Soc. geol. France, 

 s6r. 3, vol. i. no. 5, p. 53, pi. iii. figs. 27 

 R. Micr. Soc. p. 651, pi. x. figs. 4 a, b. 



Rare at Swaffham. 



s6r. 3, vol. i. no. 5, p. 53, pi. iii. figs. 27 a, b ; Chapman, 1894, Journ. 



