420 Transactions of the Society. 



275. (h-a) Marginulina trilobata d'Orbigny. 



Marginulina trilobata d'Orbigny, 1840, Mem. Soc. G-eol. France, vol. iv. 

 mem. 1, p. 16, pi. i. figs. 16, 17. Facsimile in Science Gossip, 1870, 

 p. 82, fig. 83. 



Vaginulina d'Orbigny. 



276. Vaginulina legumen Linne sp. 



Nautilus legumen Linne, 1758, Syst.Nat. 10th ed. p. 711, No. 248 ; 1767 Ibid., 



12th ed. p. 1164, No. 288. 

 Vaginulina legumen (Linne) Brady, 1884, Foram. ' Challenger,' p. 530, pi. lxvi. 



figs. 13-15. 

 Ditto. (Linne) Egger, 1899, Foram. Kreidemergeln der Oberbayerischen 



Alpen, p'. 98, pi. ix. figs. 29, 30. 



Cristellaria Lamarck. 

 114. (h-a) Cristellaria crepidula Fichtel and Moll. 

 113. Cristellaria lata Cornuel sp. 

 277. Cristellaria March I Keuss. 



Cristellaria March! Eeuss, 1860, Sitz. k. Akad. Wiss. Wien., vol. xl. p. 212, 



pi. ix. fig. 4 a, b. 

 Cristellaria MarckH (Eeuss) Burrows, Sherborn and Bailey, 1890, Journ. K. 



Micr. Soc, p. 12, pi. xi. fig. 5 a, b. 



278. Cristellaria scitula Berthelin. 



Cristellaria scitula Berthelin, 1880, Mem. Soc. Geol. France, vol. i. mem. 3, 



p. 54, pi. iii. fig. 3, a-c. 

 Ditto. (Berthelin) Egger, 1899, Foram. Kreidemergeln der Oberba) erischen 



Alpen, p. 114, pi. xii. figs. 35, 36. 37. 



This pretty little form belongs to the crepidula group, but the 

 early spiral portion is very slightly developed ; the later chambers 

 are produced in a straight Marginuline series. 



EXPLANATION OF PLATE X. 



Fig. 1. — Ellipsoidella pleurostomelloides sp.n. Large type of shell, x 100. 



„ 2.— Ditto. Ditto, x 100. 



,, 3. — Ditto. Ditto, x 100. The last chamber broken. 



„ 4.— Ditto. Small type of shell, x 100. 



„ 5.— Ditto. Ditto, x 100. 



„ 8.— Ditto. Ditto, x 100. 



„ 9.— Ditto. Ditto, x 100. 



„ 6. — Ditto. Large type of shell. The last three chambers laid open to show 

 central column and the aperture, which is alternately on either side of 

 the column in successive chambers, x 100. 



,, 7. — Ditto. View of aperture when shell is viewed from the top. 



,, 10. — Ditto. A small and imperfect specimen, viewed in balsam, as a trans- 

 parent object, x 100. 



„ 11. — Ditto. A fragment, in balsam, viewed as a transparent object, x 100. 

 This differs from the other specimens in tho fact that the column is 

 curved in opposite directions in successive chambers, and is apparently 

 not continued to the top of the chamber. 



Note. — Owing to the infiltration of calcareous matter, and possibly 

 subsequent chemical changes in fossilization, it was very difficult to 

 distinguish the internal structure of the balsam specimens, owing to 

 their opacity. 



