KONOL. SV. VET. AKADEMIENS HANDLINGAK. BAND 19. N:O 4. 83 



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



t. 4, fig. 10. 

 Plectina clava MARSS., 1877, Kiigen. Schreibekreide; Greifsw. Nat. Verein. Mitth. 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. 910. 

 PGaudryina siphonella Ess., 1851, Sept. Thon Berlin; Ztsclir. deutsch. geol. Ges. 3, p. 78, t. 5, 



figg. 4042. 

 ? HKEN., 1875, Clav. Szab. Sch. p. 14, t. 1, fig. 3. 



Textularia pupoides var. conica n. 



Tab. VI, figg. 181182. 



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 has been found only in the coralline-gravel. 



Fig. 182: apertural side. 



Textularia triquetra v. MUNST. 



Tab, VI, figg. 183184. 



This species, known as Verneuilina, tricarinata D'ORB., has been even generically 

 distinguished from Text, pupoides by D'()RBIGNY; 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 Clavulina. 



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 KAIIR. from the chalk at Letzerdorf 

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

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

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

 this case difficult to decide about. 



Our form is in its young stage nearly transparent, with an amber 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 reminds one somewhat 

 of the aperture in Valvulina or Miliolina. 



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

 Austria. 



