70 GOÉS, RETICULARIAN RHIZOPODA OF THE CARIBBEAN 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 charabers 

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

 faint hexagonal impressions like those found on Globigerina3. Generally it has coarser 

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



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

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



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

 few narrow folds. It is the same as Gvammostomum elegans Ehrknb., Brizalina cena- 

 riensis Costa, Boliv. plicata d'Orb. & Möb. Generally this has finer pores than the 

 var. dilatata. 115 6: the same more magnified. 



Figg. 116 — 123: the commonest form of Bul. punctata. 



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



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



a) minus dilatata: 



Syn. Bolivina punctata d'Okb., 1843, Voy. Ara. mer. for. p. 63, t. 8, figg. 10—12. 



u inerassata Ess., 1850, Kreidemerg. Leraberg; Haid. Nat. 4. 1, p. 45, t. 4, fig. 13. 



» eatanensis Seg., Rhizopod. Catania p. 29, t. 2, fig. 3; Accad. Gioenia Atti (2) 18. 



» punctata Bradv, 1864, Rhizopod. Shetl.; Träns. Lin. Soc. 24, p. 468, t. 48, fig. 9. 



» antiqua Egger, 1857, Miocän. Ortenburg; Leouh. u. Bronn. Jhrb. 1857, p. 294, 



t. 12, figg. 22—26. 

 1) Presli var. punctata P.\kk. and .Iones, 1865, North. AtL and Aret. Oc; PhiL Transact. 



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

 M punctata P.\rk. and Jones, 1866, Crag. For.; Pal. Soc. 19, t. 3, figg. 3 — 4. 



» ligularia Schwag., 1866, For. Kar.-Nikobar.; Novara Reise, geol. Th. 2. 2, p. 255, 



t. 7, fig. 102. 

 Textil, jurassica Gl-mb., 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. 83—84; t. 20, fig. 7; t. 21, figg. 84, 85; t. 20, fig. 10. 

 Proroporus argus Ehkenb., ibid. t. 20, fig. 8. 



Textul. linearis Ehkenb., 1854, Microgeol. t. 24, figg. 16 — 17. 



Nominib. variis Ehrenb., ibid. t. 25, figg. 16—20; t. 29, figg. 26—27. 



Grammost. eribrosum Ehrenb., ibid. t. 24, fig. 19. 



Bi'izalma senariensis Costa, 1854, Pal. Nap. 2, p. 297, t. 15, figg. 1 — 2. 



Bolivina punctata Möb., 1880, Maur. u. Seychell. p. 94, t. 9, figg. 9 — 10. 



b) magis dilatata: 



Bolivina dilatata Rss., 1849, Neue For. Österr.; Wien. Ak. Dkschr. 1. i, p. 381, t. 48, fig. 15. 



« reticulata Hken., 1875, For. Clav. Szåb. Sch. p. 65, t. 15, fig. 6. 



)) linearis Marss., 1877, Riigen. Schreibekreide; Greifsw. Nat. Verein. Mitth. 1877 — 78, 



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

 Grammost. nom. var. Ehrenb., 1854, Microgeol. t. 21, figg. 82, 86, 87; t.24, figg. 20— 24; t. 27, 



figg. 13, 20; t. 29, fig. 23; t. 32, figg. 15—19. 

 Bolivina thebaica Möb., 1880, Meeresfaun. Maurit. u. Seych. p. 95, t. 9, fig. 11. 



