KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 19. NIO 4. 121 



Vertebralina conico.articiilata Batsch. 



Tab. IX, figg. 311—318. 



This species includes a great nuiiiber of forms with such an inconstancy of cha- 

 racters that it would be wasted tiine and labour, and not only so, but inconsistent 

 with a philosophical notion of dcsignation, to range them even as distinct varieties. 

 It has one stout, highly developed, and one pigmy form. Its most singular form is 

 that in which the primordial chamber is flaskformed and the subsequent chamber deve- 

 lopes itself from the top of its neck and so on, one chamber after the other in Nodo- 

 sarina fashion; thus its iisual Miliolina formed stage is passed över altogether. 



The peneropliform variety, recorded by Carpentee, we have not met with. This 

 species is not unfrequent both in the chalk-ooze and in the coralline-gravel, and at- 

 tains a higher development on the latter. 



Figg. 311 — 313: broad, stout forms, designed by n'ORBiGNY as Vertebr. c.assis and 

 striata; Articulina Sagra d'Orb. etc. 



Figg. 314 — 315: sections in the medial plane, exhibiting the young Milioline 

 stage included in the succeeding flattened chamber of the Nodosarina growth. 



Fig. 316: pigmy form from the chalk-ooze. 



Fig. 317: rodformed ■»Articulina nitida» i)'Orb., a primordial highly developed 

 chamber taking the place of the early Miliolina-stage. 



Fig. 317 b: the same more magnified. 



Fig. 318: Very young Vei-tebralina, about 0,11 mm. in length. 



a) tenuis, articulata, striata: 



Syn. Nautilus conieo-articulatus Batscii, 1791, Seclis Kupfertafeln etc. t. 3, fig. 11 (sec. Park. et Jones). 

 Articulina nitida d'Oeb., Tab. métli.; An. So. nat. 7. p. 300; Mod. N:o 22. 



» Sagra d'Orb., 1839, Cuba p. 183, t. 9, figg. 23—26. 



» gibtaosula d'Orb., 184G, Por. tert. Vieune, p. 282, t. 20, figg. 16— 18. 



Vertebralina elongata Käre., 1868, Mioc. For. fauna Kostej; Wien. Ak. Silz.-Ber. 1. 58, p. 155, 



t. 3, fig. 10. 

 » striata var. Carpenter, 1862, Introd. t. 5, tig. 23. 



/?) tenuis, articulata, Irevis v. sublrevis: 



Vertebralina striata var. Carpenter, 1862, Introd. t. 5, figg. 19, 24. 



» sarmatiea Kärr., 1877, Hocliqu. Wasserleit.; Osterr. geol. Reichsanst. Abh. 9, p. 376, 



t. 16, fig. 12. 



b) magis dilatata, striata: 



Vertebralina striata d'Orb., 1826, Tabl. méth.; Arm. So. Nat. 7, p. 283, N:o 1; Mod. N:o 81. 



» cassis, mucronata n'ORB., 1839, Cuba p. 51, 52, t. 7, figg. 14—19.; 1846, Bass 



tert. Vienue p. 120, t. 21, figg. 18—19. 

 Articulina sulcata Rss., 1849, Neue Por. österr. tert. Beck.; Wien. Ak. Dksclir. 1. i, p. 383 



t. 49, figg. 13—17. 



K. Sv. Vet. Ak.ad, n.inrtl. Bd. lil. .\:o 4. -^ ^ 



