114 GOÉS, RETICULARIAN RHIZOPODA OF THE CARIBBKAN SEA. 



Pwlviniilina Micheliiiiana dOrb. 



Tab. Yin, figg. 296—298. 



Our ordinary form coines closo to Rotalia truncatulinoides d'Orb. from the Ca- 

 nary Islands. Its prominent characteristics are its conical form, restricted niimber of 

 charabers, deep umbilicus and deep incisions between the umbilical prolongations of 

 the chambers. The chamberwalls are often nearly plain or so very little bent, that 

 the flat spiral side becoraes obtusely angulons. The pores are not quite as fine as in 

 its congeners in general. 



It has been met with principally in the coralline-gravel, where it is common. 



Fig. 296 : the spiral side seen in transmitted lighr. 



Fig. 297: sideview. 



Fig. 298: apertural side. 



Syn. Rotalia Micheliniana d'Orb., 1839, For. Craie bl. Paris; Méni. Soc. geol. Pr. 4, p. .31, t. 3. figg. 



1—3. 

 nitida Rss., 1845, Bohm. Kreide. 1, p. 35, t. 12, figg. 8, 20, 31, t. 8, fig. 52. 



» truncatulinoides n'ORB., 1844, Hes Caiiaries p. 132, t. 2, figg. 25 — 27. 

 (Nom. varia) Kiirenh., 1854, Microgeol. t. 27, figg. 48, 51, 52; t. 28, fig. 53. 



Pulv. repanda var Menardii, subvar. Micheliniana PMiK. et Jones, 1865, Norlli. Atl. and Aret. 



Oc; Phil. Trausact. 155, p. 396, t. 14, fig. 16; t. 16, figg. 41— 43. 

 » Normanni Karrer 1878, For. Luzon; Bolet. Corais. Mapa geol. d. Espafia 7. 2, p. 24, 



t. F. fig. 10. 



Polystomclla erassiila Walk. var. Scapha Ficht. & Moll. 



Tab. Vill, figg. 299—300. 



Our form is usnally very much corapressed and starved. The aperture is narrow 

 and not easely discoverable. 



It is unfrequently met with in the ehalk-ooze. 



Syn. Nautilus Scapha Ficht. et Moll., 1803, Test. microscop. p. 105, t. 19, figg. d — f. 



Nonionina Grateloupi d'Orb., 1839, Cuba, p. 46, t. 6, figg. 6 — 7. 

 » Sloanii d'Orb., ibid. p. 46, t. 6, figg. 18— 18bis. 



» Brownii n'ORB., ibid. p. 45, t. 7, figg. 22 — 23. 



» eomraunis d'Orb., 1846, Bass. tert. Vienne, p. 106, t. 5, figg. 7 — 8. 



» » Park. et .Iones, 1857, For. Coast. of Norway; An. Mag. Nat. Hist. (2) 19, 



p. 287, t. 11, figg. 7—8. 

 Pullenia communis Hken., 1875, For. Clav. Szåb. Sch. p. 59, t. 10, fig. 10. 



Nonionina Praasana Gijmb., 1862, Streitenberg. Schwammlager; Wiirtemb. Nat. Wiss. Ver. Jhrlift. 



1862, p. 233, t. 4, fig. 5. 

 " communis (partim) Egg., 1857, Mioc. Ortcnburg; Tjeonh. u. Bronn. Jhrb. 1857, p. 298, 



t. 14, figg. 11 — 13. 

 Labradorica Daws , 1860, Canad. Geol. et Nat. 5, p. 192, fig. 4. 



