104 GOES, RETICULARIAN RHIZOPODA OF THE CARIBBEAN SEA. 



Tinoporus vesicularis PARK, and JONES. 



Tab. VII, tigg. 245247. 



Our form with its much flattened shape, and the form and arrangement of its 

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

 afford sufficient, reason for a generic 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. 



Svn. Orbitulina vesicularis, congesta, Isevis PARK, et JONES, 1863, Nomenclature LAMARCK ; 



A. M. N. H. (3) 5, p. 285, et sequ. 

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



BRADY, 1864, Rhizop. Shetland; Trans. Lin. Soc. 24, p. 470, t. 48, rig. 17. 



Pullenia sphseroides D'()RB. 



Tab. VIII, figg. 248250. 



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-gravel. 



Fig. 248 249: the compressed form of Pullenia sphcuroides. 



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



Syn. Nonion. sphseroides U'ORB., 1820, Tabl. Meth. ; Ann. Sc. Nat. 7, p. 293, N:o 1, Mod. 33. 



bulloides D'ORB., 1846, For. foss. tert. Vienne, p. 107, t. 5, figg. 910. 



var. COSTA, 1854, Pal. Nap. 2, t. 17, fig. 13. 



BOKNEM., 1855, Sept. Thon Hermsdorf; Zeitschr. deutsch. geol. Ges. 7, p. 



339, t. 16, tigg. 13. 

 PAKK. et JONES, 1859, For. Coast, of Norway; Ann. Mag. Nat. Hist. (2) 



19, p. 287, t. 11, figg. 910. 

 Pullenia sphseroides PARK, et JONES, 1865, North. Atl. and Arct. Oc.; Phil. Trans. 15. 1, p. 



368, t. 14, lig. 43, t. 17, fig. 53. 



<> PARK, et JONES, 1866, Crag. For.; Pal. Soc. 19, t. 2, figg. 3132, 



CARPENTER, 1862, Introd. p. 184, t. 12, fig. 12. 



