70 



GOES, KKTICULAlilAN K11J/OPODA OF THK CAHIBHKAN SEA. 



The shape of the shell is liable to great variations according to the greater or 

 less degree of convexity of the septa and marginal walls, the breadth of the chambers 

 and its gradual or more rapid increase in size. Sometimes the surface is provided with 

 faint hexagonal impressions like those found on Globigerirni-. Generally it has coarser 

 pore-canals than its congeners, the pores equalling in size those of some Plariorbulina;. 



The very faint longitudinal folds which some times adorn our form can scarcely 

 be of any, even varietal, importance, being often wanting. 



Figg. 114 115: the narrow form of Bui. punctata, sometimes provided with a 

 few narrow folds. It is the same as Grammostomum. elegans EHKKNB., Brizalina aina- 

 riensis COSTA, Boliv. plicata n'ORB. & MOB. Generally this has finer pores than the 

 var. dilatata. 1156: the same more magnified. 



Figg. 116 123: the commonest form of Bui. punctata. 



Figg. 124 126: the broad form, called dilatata Rss. 



It is very common on the chalk-bottom but it is of very small size. 



a) minus dilatata: 



Syn. Bolivina punctata 

 inerassata 



catanensis 



punctata 



antiqua 



n'G-RB., 1843, Voy. Am. mer. for. p. 03, t. 8, figg. 10 12. 

 Ess., 1850, Kreidemerg. Lemberg; Haid. Nat. 4. 1, p. 45, t. 4, fig. 13. 

 SEG., Ehizopod. Catania p. 29, t. 2, fig. 3; Accad. Gioenia Atti (2) 18. 

 BRADY, 1864, Rhizopod. Shetl.; Trans. Lin. Soc. 24, p. 468, t. 48, fig. 9. 

 EGGEH, 1857, Miocati. Ortenburg; Leonh. u. Bronn. Jhrb. 1857, p. 294, 



t. 12, figg. 2226. 

 Presli var. punctata PARK, and JONES, 1865, North. Atl. and Arct. Oo.; 1'hil. Transact. 



155. 1, p. 376, t. 17, fig. 74. 



PARK, and JONES, 1866, Crag. For.; Pal. Soc. 19, t. 3, figg. 34. 

 SCHWAG., 1866, For. Kar.-Nikobar.; Novara Eeise, geol. Th. 2. 2, p. 255, 



t. 7, fig. 102. 

 GUMB., 1862, Streitenb. Schwammlag.; Wiirtemb. Nat. Verein. Jhrhft. 21, 



p. 228, t. 4, fig. 17. 

 Grammostomum laterale, polystigma, elegans, plica, aciculatum EHRENB., 1854, Microgeol. t. 19, 



figg. 8384; t. 20, fig. 7; t. 21, figg. 84, 85; t. 20, fig. 10. 

 EHUENB., ibid. t. 20. fig. 8. 

 EHRENB., 1854, Microgeol. t. 24, figg. 1617. 

 EHRENB., ibid. t. 25, figg. 1620; t. 29, figg. 2627. 

 EHRENB., ibid. t. 24, fig. 19. 



COSTA, 1854, Pal. Nap. 2, p. 297, t. 15, figg. 12. 

 MOB., 1880, Maur. u. Seychell. p. 94, t. 9, figg. 910. 



punctata 



ligularia 



Textil. jurassica 



Proroporus argus 

 Textul. linearis 

 Nominib. variis 

 Grammost. cribrosum 

 Brizalina senariensis 

 Bolivina punctata 



b) magis dilatata: 



Bolivina dilatata 

 reticulata 



linearis 



Grammost. nom. var. 

 Bolivina thebaica 



Ess., 1849, Neue For. Osterr.; Wien. Ak. Dkschr. 1. 1, p. 381, t. 48, fig. 15. 



HKEN., 1875, For. Clav. Szab. Sch. p. 65, t. 15, fig. 6. 



MARSS., 1877, Eiigen. Schreibekreide; Greifsw. Nat. Verein. Mitth. 1877 78, 



p. 155, t. 3, fig. 22. 

 EHRENB., 1854, Microgeol. t. 21, figg. 82, 86, 87; t.'24, figg. 2024; t. 27, 



figg. 13, 20; t. 29, fig. 23; t. 32, figg. 1519. 

 MOB., 1880, Meeresfaun. Maurit. u. Seych. p. 95, t. 9, fig. 11. 



