104 GOÉS, RETIOULARIAN RHIZOPODA OF THE CARIBBEAN SEA. 



Tilioporus veslcularis Park. and Jones. 



Tab. VII, figg. 245—247. 



Our form with its much flattened shape, and the forin and arrang-ement of its 

 chambers suggests at once its afRiiity to Planorbulina; an affinity almost too close to 

 afford sufficient reason for a generie distinction. The surface is somewhat foveolate- 

 reticulated with faintly marked septal lines, and of a light-brown colour. A remar- 

 kable feature is the slight differentiation of the chambers in the median plane, which 

 are somewhat larger than those of the other layers, this arrangement in some degree 

 approaching the structure of Orbitoides. 



It is not common on the coralline-gravel. 



Fig. 245: Tinoporus vesicularis with its areolated surface. 



Fig. 246: a vertical section in the median plane. 



Fig. 247: Section through or near the horizontal middle-plane. 



Syn. Orbitulina vesicularis, congesta, Isevis Park. et Jones, 186.3, Nomenclature — Lamarck — ; 



A. M. N. H. (.3) b, p. 285, et sequ. 

 Tinoporus Isevis Carpenter, 1862, Introd., p. 224, t. 15, figg. 1 — 4. 



» » Brady, 1864, Rhizop. Shetland; Träns, Lin. Soc. 24, p. 470, t. 48, tig. 17. 



Pullenia spliaeroides dOrb. 



Tab. VIII, figg. 248—250. 



This little thickwalled, highly polished, milkwhite rhizopode attains seldom a 

 a greater diameter than 0,50 mm. Its shape is often subglobose, but somewhat com- 

 pressed forms also occur. It is frequently somewhat unsymmetrical; the aperture being 

 placed somewhat to one side. The form called Pullenia obliqueloculata Pakk. and Jones 

 is such a variety with a more conspicuous lack of symmetry. 



It is not uncommon in the coralline-oravel. 



Fig. 248 — 249: the compressed form of Pullenia sphceroides. 



Fig. 250: nearly globose, with slightly unsymmetrical whorls. 



Syn. Nonion. sphseroides i)'Orb., 1826, Tabl. Metii.; Ann. Se. Nat. 7, p. 293, N:o 1, Mod. 33. 



M buUoides r)'ORB., 1846, For. foss. tert. Vienne, p. 107, t. 5, figg. 9 — 10. 



» " var. Costa, 1854, Pal. Nap. 2, t. 17, fig. 13. 



» M BoRNEM., 1855, Sept. Thon Hermsdorf; Zeitschr. deutsch. geol. Ges. 7, p. 



339, t. 16. tigg. 1—3. 

 » o Park. et Jones, 1859, For. Coast. of Norway; Ann. Mag. Nat. Hist. (2) 



19, p. 287, t. 11, figg. 9—10. 

 Pullenia sphseroides Park. et Jones, 1865, North. Atl. and Aret. Oc.; Phil. Träns. 15. 1, p. 



368, t. 14, fig. 4.3, t. 17, fig. 53. 

 « " Park. et Jones, 1866, Crag. For.; Pal. Soc. 19, t. 2, figg. 31—32, 



)/ » Carpenter, 1862, Introd. p. 184, t. 12, fig. 12. 



