272 INDEX TO THE GENERA AND 



OPERCULINA sp. (after Carpenter). Reuss' Models, No. 100, 1865. (Catal. 



No. 98, 1861.) 



. Kolliker, Icones Histiologicae, 1864, 31. [Structural.] 



Williamson, Pop. Sci. Rev. IV, 1865, 173, viii, 14. [Section of shell-wall 



showing pseudopodial tubes.] 



Figuier, Ocean World [1873], p. 84, fig. 19. 



Carpenter, Ency. Brit. 9th ed. ix, 1879, Foraminifera, 381, flg. 22. 



[Structure.] 



Biitschli, in Bronn, Klassen, etc. Thier-Reichs, 1880, 212, x, 4. 



OPERCULUM minimum Littoris Arimenensis durissimum depres- 



sum, Cornu Hamnionis quodanimodo referens. Plancus, De Conch. 



Min. 1739, also 1760, p. 18, pi. iii, A, B, C ; and pi. iii, f. 2 E, D, C. 



[= ? Biloculina.J 



see Umbilicum. 



OPHIDIONELLA, De Folin, 1881. Bull. Soc. N. H. Toulouse, xv, 1881, 



p. 140, n. d. 1 sp. proposed. 

 OPHTHALMIDIUM, Zwingli & Kubler, 1870. Foram. Schweiz. Jura, 1870, 



p. 46, etc. ; Brady, Report Challenger, 1884, p. 188. 

 auris, Zwingli & Kiibler. Foraminif. Schweiz. Jura, 1870, 31, iii, 49. 



[= Quinquelocuilna.'] 

 birmenstorfensis, Zwingli & Kiibler. Foraminif. Schweiz. Jura, 1870, 



31, iii, 46. [= Spiroloculina.~\ 

 carinatum., Balkwill & Wright. Trans. R. Irish Ac. xxviii (Sci.), 



1885, 326, xii, 13-16. 

 Zwingli & Kiibler. Foraminif. Schweiz. Jura, 1870, 22, ii, Orna- 



tenthon, 6 ; 16, ii, Blagdeni-schichten, 11 and 12. 



- Haeusler, Neues Jahrb. 1887, i, 194, vii, 39, 40, 43-45, 



47-51. 

 cornuspiroides, Zwingli & Kiibler. Foraminif. Schweiz. Jura, 1870, 



31, iii, 50. 

 gracile, Zwingli & Kiibler. Foraminif. Schweiz. Jura, 31, iii, 47. 

 inconstans, Brady. Report Challenger, 1884, 189, xii, 5, 7 and 8. 



[Hauerina, 1879.] 



Brady, Parker, & Jones, Trans. Zool. Soc. xil, pt. 7, 



1888, 216,.xl, 12, 13. 

 liasicum, Zwingli & Kiibler. Foraminif. Schweiz. Jura, 1870, ii, i, 



Jurensismergel, ii. 



medium, Zwingli & Kiibler. Foraminif. Schweiz. Jura, 1870, 31, iii, 48. 



multiplex, Zwingli & Kiibler. Foraminif. Schweiz. Jura, 1870, 22, ii, 



Ornatenthon, 7. 

 nubeculariformis, Haeusler. Neues Jahrb. 1887, i, 193, vii, 52, 53, 



55, and 56. 

 okeni, Zwingli & Kiibler. Foraminif. Schweiz. Jura, 1870, 18, ii, Park- 



insonthon, 10, 11. 



orbiculare, Burbach. Zeitschr. naturw. Halle, Lix, 1886, 499, v, 3-6. 



ovale, Burbach. Zeitschr. naturw. Halle, lix, 1886, 499, v, 7-12. 



porosum, Zwingli & Kiibler. Foraminif. Schweiz. Jura, 1870, 14, ii, 



Opalinusthon, 7. 

 superbum, Zwingli & Kiibler. Foraminif. Schweiz. Jura, 1870, 47 iv, 



Anhang 5. [== Quinquelocuilna. ~\ 

 tongricum, Zwingli & Kiibler. Foraminif. Schweiz. Jura, 1870, 47, iv, 



Anhang 3, 4. [^ Spiroloculina.'] 



tumidulum, Brady. Report Challenger, 1884. 189, xii, 6. 



walfordi, Haeusler. Neues Jahrb. 1887, i, 192, vi, 7-11. 



Wallich, North Atlantic Sea-bed, pt. i, 1862, n. d. v, 13. 



Haeusler, Neues Jahrb. 1887, i, 190, vi and vii. 



Neumayr, Stamme d. Thierreiches, i, 1889 (1888), 177, fig. 19. 



ORBICULA depressa. Reeve. Conch. System, ii, 1842, 289, ccxcvii, 3. 



\_Heterostegina depressa., d'O. = Heterosteg.J 



