KONGL. SV. VET. AKADEMIENS HANDLINGAK. BANJ). 19. N:O 4. 141 



Syn. Lituola nautiloides u'ORB., 1839, For. Craiu bl. Paris; Mem. Soc. geol. France 4, p. 29, t. 2, 



figg. 2831. 

 u'ORB., 1846, For BBS. tert. Vienne p. 138, t 21, figg. 2021. 



Rss., 1859, Westphal. Kreide; Wien. Ak. Sit/.-Ber. 40, p. 220, t. 10, figg. 



58. 

 nautiloidea BRADY, 1876, Carbonif. and Perm. For.; Palaeontogr. Soc. 30, p. 63, t. 8, 



fig. 7. 

 CAHPENT., Introduct. t. 6, fig. 44. 



Lituolina irregularis var. compressa n. 



Tab. XII, figg. 421423. 



This form seems nearly identical with Haplophragmium acutidorsatum HANTKEN 

 from the Clavulina Szaboi strata in Hungary. 



Compressed forms of Lituolinje have seldom come under notice, but this sur- 

 passes in flatness all such described forms being probably a star ved variety of the type. 

 It is on both sides somewhat umbilicated; somewhat rough or scrobiculate, and ap- 

 pears as if felted together of siliceous needles and a smaller quantity of grains of 

 sand, whence the surface presents a sericeo-tomentous aspect. The septal lines are 

 very indistinct. The adult shows a tendency to become lituiforrn, the aperture being 

 placed near the top of the last chamber, otherwise it has its ordinary Nonioriinoid 

 shape and place. Since the principal constituents of the shell are hyaline and colour- 

 less in themselves, it is evident that its rust-colour is not derived from any materials 

 with colour of their own but from the partly precipitated arid partly secreted, coloured 

 cementing matter. 



Raphidohelix elegans MOB., Mauritius p. 76, t. 2, fig. 2 seems to belong to this 

 variety; perhaps also Haplophragmium foliaceum BRADY, Qu. J. Micr. Sc. (N. S.) 81, 

 p. 50. 



It is scantily met with in the coralline-gravel. 



Fig. 421 : sideview. 



Fig. 422 : edgeview. 



Fig. 423 : Thin section showing the texture of the test and the faintly marked 

 septa. 



Lituolina irregularis var. globigerinaiforinis PAKK. and JONES. 



Tab. XII, figg. 424425. 



Notwithstanding the suggestive assumption advanced by some most able and ex- 

 perienced investigators as to the true Giobigerine nature of this form, its arrangement 

 of chambers and apertures being so characteristic as to leave no room for doubt that 

 these forms are true Globigerinae and not Lituola3 (G. C. WALLICH, M. D., Deep-sea- 

 researches on the biology of Globigerina, Lond. 1876, p. 63), and although there is 

 occasionally associated with it a nautiioid form with globular chambers exactly in con- 



