KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 19. N:0 4. 83 



Syn. Gaudryina pavicula Schwau., 1866, For. Kar.-Nikobar; Novara Reise, geol. Th. 2. 2, p. 198, 



t. 4, fig. 10. 

 Plectina clava M.\rss., 1877, Ruoen. Sclireibekreide; Greifsw. Nat. Vereiii. Mittli. 1877 — 78, 



p. 160, t. 3, fig. 29. 

 PClavulina robusta Stache, 1865, Tert. Merg. Whaingar. Hafen; Novara Reise, geol. Th. 1. 2, 



p. 169, t. 21, figg. 9—10. 

 ? Gaudryina siphonella Rss., 1851, Sept. Tbon Berlin; Ztsclir. deutsch. geol. Ges. 3, p. 78, t. 5, 



figg. 40—42. 

 ? ■ .. » Hken., 1875, Clav. Szåb. Sch. p. 14, t. 1, fig. 3. ■ 



Textiilaria piipoides var. coiiic.i n. 



Tab. VI, figg. 181—182. 



This variety, which resembles somewhat Gaudryina oxycona Rss. differs from 

 the type-species in being very pointed with a square or trigonal early stage and co- 

 nical-round textularia-stage. It is very tightly built with scarcely any external visible 

 traces of septal impressions or lines. Sometimes it is still more slender and produced 

 than is represented by fig. 181. 



It bas been found only in the coralline-gravel. 



Fig. 182: apertural side. 



Textiilaria triquetra v. Munst. 



Tab, VI, figg. 183—184. , 



This species, known as Verneuilina tricarinata d'Orb., has been even generically 

 distinguished from 7W. pupoides by d'Orbigny; and yet it is nearly impossible to 

 draw a clear line of specific distinction between the two. Both have their young stage 

 constructed after the same plan, both are dimorphous; the more developed form of T. 

 triquetra is commonly referred to nClaimlina}K 



It is besides somewhat remarkable, that Text. triquetra and T. pupoides some- 

 times, when from the same bottom, get exactly the same accidental feature of the 

 shell surface; as for instance Verneuilina cretacea Kärr. from the chalk at Letzerdorf 

 which is provided with the same sort of tubercles all över its surface, as Gaudryina 

 crassa Kärr. from the same place. Whether this external likeness is the result of an 

 extreraely close relation between the two or an adaptation to local circumstances is in 

 this case difRcult to decide about. 



Our form is in its young stage nearly transparent, with an araber tinge in trans- 

 mitted light; the pores are fine and pretty close. The sides are sometimes scooped 

 out a little, so that the edges become quite sharp; the month rerainds one somewhat 

 of the aperture in Valvulina or Miliolina. 



It is identical with Verneuilina spinidosa Rss. from the tertiary formation of 

 Austria. 



