KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 19. N:0 4. 103 



Syn. Truncat. varians Ess. 1860, For. Cras:. v. Antwerp.; Wien. Ak. Sitz.-Ber. 42, p. .359. t. 2, 



fi£r. 12. 



» lucida Kss., 1865, Deutsch. Septarienthon; Wien. Ak. Dkschr. 1. 25. i. p. 160, 



t. 4, fig. 15. 

 » Dutemplei Rss., ibid. p. 160, t. 4, fig. 16. 



» « Hke-, 1875, For. Olav. Szåb. Scliichten p. 157, t. 8, figg. 19—21.. 



» tenella Ess., 1864, Oberoligocän.; Wien. Ak. Sitz.-Ber. 1.50, p. 477, t. 5, fig. 6. 



Bosalina patella Egger, 1857, Mioc. Ortenb.; Leonh. u. Bronn. .Ihrb. 1857, p. 278, t. 10, 



figg. 12—14. 



Planorbuliiia Ungeriaiia var. afflxa n. 



Tab. VII, figg. 237—241. 



Notwithstanding its tiner pores and its other deviation from the type, the texture, 

 surface of the shell and the arrangement of the chanibers, this form bear too close 

 an affinity to Plan. Ungeriana not to be ranged under this species. Its upper side is 

 often scooped out in an irregular mannar, and the much flattened shell is somewhat 

 undulated with irregular sinuous edges, indicating an attached life. The central boss 

 on this side is sometiiucs wanting, bnt never on the opposite (apertural) side. 



It is not very common in the coralline-gravel. 



Fig. 237: represcnts a transverse section near the attached side. 



Fig. 238: edge view of the same specimen. 



Fig. 239: another specimen; its upper hollowed out side. 



Fig. 240: the edge view, showing the shell as if bent in its diameter, the upper 

 side being concave, the apertural side convex. 



Fig. 241: the apertural side. 



Planorbulina reticulata Czjz. 



Tab. VII, figg. 242—244. 



This remarkable species was first described in 1847 as occuring in the tertiary 

 strata of Austria by Czjzek. Its close affinity to the genus Planorbulina has been as- 

 serted by Messrs Parker and Jones. One side is generally sraooth the other wrinkled 

 or coarsely striated. The pores are coarse and often stånd closer together at the 

 central part of the shell. Its broad marginal keel is transversely costated and seems 

 to be a constant appendage. Some pigmy forms have their chambers arranged in a 

 very imperfect coil; the primordial chamber not being placed in the centre. 



It occurs not uncommonly both in the chalk-ooze and in the coralline-gravel. 



Fig. 242: the striated side. 



Fig. 243 : a younger specimen seen in transmitted light. 



Fig. 244: pigmy form in transmitted light, magnified. 



Syn. Rotalina reticulata Czjz., 1847, For. foss. Wien. Beck.; Haid. Nat. Abh. 2. i, p. 145, t. 13, 



figg- 7—9. 

 Siphonina fimbriata Ess., 1849, Neue for. österr. tert. Backen; Wien. Ak. Dksclir. 1. 1, p. 372, 



t. 47, fig. 6. 

 puteolana Costa, 18.54, Fal. Nap., t. 27, fig. 22. 



