142 FORAMINIFERA OF THE CRAG. 



The Textilarias are so very variable in their growth, forming vesicular, quad- 

 rate, or flattened chambers, and arranging them sometimes quite regularly and at 

 other times with a want of neatness, that there may be almost as many names for 

 them as there are groups of more or less similar individuals. 



Specimens having sandy shell-tissue were grouped as Plecaniurn by von Reuss 

 (' Sitzungsb. k. Akad. Wiss. Wien,' vol. xliv, 1861, p. 383). 



1. Textilaria sagittula, Defrance, 1824. Plate III, figs. 7 — 9; Plate V, figs. 15, 



16, 18. 

 Part I, 1866, Appendix II, Table, No. 64. 



Polymorpha sagittulse, Soldani, 1791. Testae, vol. i, part 2, p. 120, pi. exxxiii. 



The figures given by Soldani are rough and obscure, but figs. 0, P, Q, K, T, V, may 

 be equivalent to various forms of T. sagittula. Pig. S appears to be T.jugosa, 

 Brady. 



Textulaeia sagittula, Defrance, 1824. Diet. Sci. Nat., vol. xxxii, p. 177 ; 



vol. liii, p. 314; Atlas Couch., pi. xiii, fig. 5. 



— — Blainville, 1825. Malacologie, p. 370, pi. v, fig. 5. 



— d'Orbigny, 1826. Ann. Sci. Nat., vol. vii, p. 263, No. 20. 

 Saulctana, Idem, 1839. Foram. Cuba, p. 142, pi. i, figs. 21, 22. 



— cuneifobmis, Idem, 1839. Ibid., p. 138, pi. i, figs. 37, 38. 

 Baudouinana, d'Orb., 1840. Mem. Soc. Geol. France, vol. iv, Mem. 



No. 1, p, 40, pi. iv, figs. 29, 30. 

 sagittula, Reuss, 1846 In Geinitz's Grundriss, &c, part 2, p. 680, 



pi. xxiv, fig. 72. 

 Nussdorfensis, Idem, 1846. Foram. Foss. Yienne, p. 243, pi. xiv, 



figs. 17—19. 

 Beonniana, Idem, 1846. Ibid., p. 244, pi. xiv, figs. 20—22. 



— depeedita, Idem, 1846. Ibid., figs. 23 — 25. 



pala, Gzjzeh, 1848. liaidiugers Nat. Abhandl., vol. ii, p. 148, pi. xiii, 

 figs. 25—27. 



— pe^longa, Idem, 1848. Ibid., p. 149, pi. xiii, figs. 28 — 30. 



acuta, Reuss, 1850. Denksch. k. Akad. Wien, vol. i, p. 381, pi. xlix, 

 fig. 1 ; 1855, in Quenstedt's Handb. Petrel, 

 edit. 3 (5), p. 1059, pi. lxxxvi, fig. 60. 

 sp., Mantell, 1850. Q. J. G. S., vol. vi, p. 330, pi. xxix, fig. 1. 

 mutata, Costa, 1856. Atti Accad. Pontan., vol. vii, i'asc. 2, pi. xxiii, 



fig. 19, and indet., fig. 20. 

 CUNEIeoumis, Williamson, 1858. Pec. Foram. Brit., p. 75, pi. vi, 



figs. 15S, 159. 

 sagittula, P. and J., 1863. Ann. Mag. N. H., ser. 3, vol. xi, p. 96. 



