KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 19. N:0 4. 105 



Syn. Pullenia bulloides Hken., 1875, Clav. Szåb. Sch., p. 59, t. 10, fig. 9. 



» obliqueloeulata P.\ek. and Jones, 1865, Avct. and Northatl. Ocean; Phil. Träns. 155. 1, 



t 19, fig. 4. 



b) magis CO in pressa: 



Nonion. quaternaria Rss., 1850, Kreidemerg. Leraberg; Haid. nat. Abh. 4. 1, p. 34, t. 2, fig. 13. 



" quinqueloba Rss., 1851, Sept. Thon v. Berlin; Zeitschr. deutsch. geol. Ges. 3, p. 72> 



t. 5, fig. 31. 

 Pullenia eompressiuseula jj quadriloba Rss., 1867, Steinsalzablager. Wieliezka; Wien. Ak. Sitz.- 



Bev. 1. 55, p. 87. t. 3, fig. 8. 



Discorbina rosacea dOrb. 



Tab. VIII, figg. 251—257. 



Our form i.s generally of pigmy size; it comes near to Asterigerina planorbis 

 d'Orb. and Egger (from the tertiary strata) and is also nearly identical in shape with 

 Ros. AuberiA d'Orb. from the West Indies. Its most striking feature is its semilunar, 

 long chainbers, and their restricted nuraber in each convolution. It has a yellowish 

 hue in transmitted light. 



The scantiness of our supply of Discorbinaä and the uncritical raethod of specitic 

 distinction and representation of the forms adopted by the different authors make us 

 iinable to make a satisfactory disposition of the forms in their natural places, not- 

 Avithstanding the very sagacious hints in regard to this matter given by Messrs. Parker 

 and Jones. 



The difierence between Discorb. rosacea and valvulata is very slight. 



It is not uncommon, but always in a pigmy-state, (0,25 mm.) in the chalk-ooze. 



Figg. 251 — 2b?>; Discorbina rosacea; 251 b: the same more enlarged, in trans- 

 mitted light. 



Figg. 254 — 255: another specimen, spiral and apertural sides. 



Figg. 256 — 257: young small specimens; it has sometimes a clouded appearance 

 in transmitted light. 



Syn. Rotalia rosacea d'Orb., 1826, Tab. raeth.; An. Se. Nat. 7, p. 273, N:o 15, Mod. 39. 



Discorbina turbo var rosacea Park. et Jones, 1865, North. Atl. and Aret. Oe.; Phil. Trausact. 



155. 1, p. 385, t. 16, fig. 28. 

 » rosacea Park. et Jones, 1866, Crag. For.; Pal. Soc. 19, t. 4, tig. 17. 



Rotalia Mamilla, ochracea Williams., 1858, Brit. rec. förf. p. 54, 55, tigg. 109 — 113. 

 Asterigerina planorbis d'Okb., 1846, For. tert. Vienne p. 205, t. 11, figg. 1 — 3. 



» » Egger, 1857, Mioc. Ortenburg; Leonh. n. Bronn. Jhrb. 1857, p. 281, t. 11, 



figg. 8 -10. 

 Bosalina Auberii d'Oe,b., 1839, Cuba, p. 94, t. 4, figg. 5 — 8. 



Truncat. flos Kärr., 1868, Mioc. For. faun. Kostej; Wien. Ak. Sitz.-Ber. 1. 58, p. 182, 



t. 4, fig. 15. 



K. Sv. Tet.-Akad. Handl. Bä. 19. JTio 4. " 14 



