606 Transactions of the Society. 



Eept. Geol. and Nat. Hist. Survey of Minnesota for 1884, p. 175, 

 pi. iv. rig. 35. Operculina sp. Blackenhorn, 1890, Zeitschr. deutsch. 

 geol. Gesell., p. 339, pi. xvii. figs. 2, 3. 0. complanata (Defr.) 

 Woodward and Thomas, 1893, Geol. and Nat. Hist. Survey of 

 Minnesota, vol. iii. p. 45, pi. E. fig. 37. 0. complanata (Defr.) Egger, 

 1893, Abhandl. k. bayer. Akad. Wiss., CI. II. vol. xviii. p. 435, 

 pi. xx. figs. 40-42. 0. complanata (Defr.) Jones, 1897, Palseont. 

 Soc., p. 362, pi. ii. rigs. 49, 50. 0. complanata (Defr.) Newton and 

 Holland, 1902, Journ. Coll. Sci. Imp. Univ. Tokyo, p. 13. pi. i. 

 figs. 3, 5, pi. iii. fig. 3. 0. complanata (Defr.) Lister, 1903, The 

 Foraminifera, in Lankester's Zoology, p. 126, fig. 55. 



Operculina complanata var. granulosa Leymerie. 



Operculina granulosa Leymerie, 1846, Mem. Soc. Geol. France, 

 ser. 2, vol. i. p. 359, pi. xiii. fig. 12. O. complanata var. granulosa 

 (Leym.) Woodward and Thomas, 1885, 13th Ann. Eept. Geol. and 

 Nat. Hist. Survey of Minnesota for 1884, p. 176, pi. iv. fig. 36. 

 0. granulosa (Leym.) Egger, 1893, Abhandl. k. bayer. Akad. Wiss., 

 CI. II. vol. xviii., p. 435, pi. xx. figs. 36, 37, 43. O. complanata var. 

 granulosa (Leym.) Idem, 1899, Ibid. vol. xxi. p. 175, pi. xix. figs. 

 33, 34. O. complanata var. granulosa (Leym.) Newton and Holland, 

 1902, Journ. Coll. Sci. Imp. Univ. Tokyo, vol. xvii. p. 14, pi. ii. 

 rig. 4, pi. iii. fig. 5. 



Both these forms occur in the two Areas, and mostly at the 

 same Stations. With few exceptions the examples are small and 

 ill -developed. 



Heterostegina d'Orbigny. 



Heterostegina deprcssa d'Orbigny. 



Heterostegina deprcssa d'Orbigny, 1826, Ann. Sci. Nat., vol. vii. 

 p. 305, No. 2, pi. xvii. figs. 5-7 ; Modele, No. 99. H. depressa 

 (d'Orb.) Terrigi, 1889, Mem. E. Accad. Lincei, ser. 4, vol. vi. p. 122, 

 pi. x. fig. 1. H. curva (Moebius) Egger, 1893, Abhandl. k. bayer. 

 Akad. Wiss., CI. II. vol. xviii. p. 434, pi. xx. figs. 26-31 ; and H. 

 depressa (d'Orb.) p. 433, pi. xx. figs. 34, 35. H. depressa (d'Orb.) 

 Jones and Chapman, 1900, In A Monograph of Christmas Island, 

 p. 229, pi. xx. fig. 1. H. depressa (d'Orb.) Chapman, 1900, Journ. 

 Linn. Soc. (Zool.), vol. xxviii. p. 18, pi. iii. figs. 6, 7 ; Idem, 1900, 

 Geol. Mag., n. s., dec. 4, vol. vii. pi. xiii. fig. 7 ; Idem, 1902, Ibid., 

 vol. ix. p. 10, pi. iv. fig. 1. H. depressa (d'Orb.) Lister, 1903, The 

 Foraminifera, in Lankester's Zoology, p. 128, fig. 56. H. suborbi- 

 cularis (d'Orb.) (cf. H. depressa d'Orb.) Fornasini, 1903, Boll. Soc. 

 Geol. Italiana, vol. xxii. p. 396, pi. xiv. figs. 5, 6. 



This form is represented in the Malay Archipelago by a few 

 small examples occurring at Stations in Area 1. 



