KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 19. N:0 4. 139 



Lituolina irregularis ROM. 



Tab. XII, figg. 419420. 



As I am unable with any degree of certainty to identify Lituolites deformis (alias 

 di/urmis) LMCK. (Encycl. meth. Moll. Test. t. 466, fig. 1; Ann. Mus. 8, t. 62, f. 13) 

 on account of it being less satisfactorily delineated, ROEMERS designation must be applied 

 to this form, which is of the same shape as Haplophra<jmium crassum REUSS, an inflated 

 form of Lit. canariensis D'ORB., which is to be regarded as a juvenile form of Lit. 

 irregularis. 



Since the difference between this species and its variety, Lit. nautiloidea. LMCK. 

 consists only in the chambers of the latter being subdivided, it is not always possible 

 to refer their different designations by various authors to their proper places in a list 

 of synonyms. 



Our form has a tolerably compactly built shell composed of coarse polished 

 grains of siliceous sand. The aperture is narrow and sometimes replaced by a 

 number of pores; the chambers undivided. 



It is sparsely met with in the coralline-gravel. 



A) libera: 



a) minus in flat a: 



Syn. Spirolina irregularis ROM., 1841, Verstein. nordd. Kreidegeb. p. 98, t. 15, fig. 29. 



lagenalis Hon., ibid. fig. 28. 



sequalis ROM., ibid. fig. 27. 



PHaplophrag. irregulars FRK;S Modell. N:o 4 (an Lit. nautiloidea LMCK.). 

 Spirolina irregularis Rss., 1845, Bohm. Kreide 1, p. 35, t. 8, figg. 62 66, 75. 

 Haplophragm. irregulare Rss., 1859, Westphiil. Kreidegeb.; VVien. Ak. Sitz.-Ber. 40, p. 219, t. 11, 



fig. 1. 

 sequale Rss., ibid. p. 218, t. 11, figg. 2 3; 1862, Nordd. Hils. u. Gault; Wien. 



Ak. Sitz.-Ber. 1. 46, p. 29, t. 1, figg. 17. 



Spirolina agglutinans D'ORB., 1846, For. Bass. tert. Vienne, p. 137, t. 7, figg. 10 12. 

 Lituola nautiloidea var. PARK, et JONES, 1860, For. C'hellaston; Quart. Jouru. geol. Soc. 16, p. 453. 



t. 20, fig. 47. 



Spirolina grandis Rss., 1854, Kreide Ostalp.; Wien. Ak. Dkscbr. 7, p. 69, t. 25, fig. 14. 



simplex Rss., 18.55, Tert. Scliicht. nordl. u. mittl. Deutschl.; Wien. Ak. Sitz.-Ber. 



1. 18, p. 232, t. 2, fig. 30. 

 Haplophragm. rectum BRADY, 1876, Carbonif. and Perm. Foramf.; Pal. Soc. 30, p. 66, t. 8, figg. 



89. 

 suprajurassicum SCHWAG., 1863, Jurass. Sch.; Wiirtemb. Nat. Verein. Jhrhft. 1865, 



p. 92, t. 2, fig. 1. 

 tuba GiiMB., 1868, For. nordalp. Eociin.; K. Bayr. Ak. Wiss. 1. 10. 2, p. 600, 



t. 1, fig. 1. 

 lituus KAHR., 1861, Marin. Tegel Wien. Beck.; Wien. Ak. Sitz.-Ber. 1. 44, p. 450, 



t. 2, fig. 7. 

 Spirolina Humboldti Rss., 1851, Sept. Thon v. Berlin; Zeitschr. deutsch. geol. Ges. 3, p. 65, 



t. 3, figg. 17-18. 



Haplophragm. Humboldti Rss., 1865, deutsch. Sept. Thon; Wien. Ak. Dkschr. 1. 25. 1, p. 119, 



t. 1, figg. 14. 



