KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 32. N:0 I. 



131 



Plate IX. 



Priipora ronferta ItDW. tt H. p. 93. 



Fig. 1, "2. Sections of specimen from Borkliolra, Est- 

 land. Vi- The fine needles visible on tho 

 interiör walls of the calicles and on the 

 tabulje are inorganic or crystals. 



:> .3. Microscopic structure of calicinal thecas. Spe- 

 cimen from Piersal {F^) Estland, '-/i. The 

 composition of the thecae and septa of 

 fibrillaj is plainly visible. The Favositoid 

 structures in the centres of some calicles 

 possibl)' of parasitic nature. 



» 4. Fragment of a calicle in longitudinal section, 

 same specimen. */i. A pair of septal ridges 

 between which the tabula; form a sort of 

 septal groove, as indicated by the concave 

 lines. 



•> 5, 6. Sections of a variety from Tsién-shui in 

 China. "/i. In fig. 6 partial destruction of 

 calicinal theca through coenenchyma. No 

 apertures in the theca to be assumed. 



Fig. 7, 8. 



9, 10. 



11, 12. 



Ditto of a specimen from the iniddle Tun- 

 guska, Siberia. ''/i. 



Ditto of a variety with uncomraonly thick 

 walls from Alleberg, Westrogothia. Vi. 



Sections of a specimen from Anticosti, Ca- 

 nada, from type specimen of BlLLmG's 

 Heliolites affinis. Vi- 

 Surface of the same in nat. size. 

 15. A variety from Klef in Sundre, Gotland, 

 14 nat. size, 15 a calicle magnified. "/i- 

 Part of the surface of a specimen from Dale- 

 carlia, Sweden, nat. size. 

 17, 18. Sections of a specimen from Arfvet in 

 Dalecarlia, Sweden. ^'l, 

 Part of the surface of the same nat. size. 

 Ditto, specimen from östbjörka, Dalecarlia. 

 21, 22. Sections of the same. Vi- 

 23. Longitudinal section, ^ji, of a specimen fonnd 

 detached in a canal at Wall, Gotland. 



13. 



14, 



16. 



19. 



20. 



Fig. 24, 25. Sections of a specimen from the Arachno 

 phyllum-beds near Wisby. Vi- 



Frojjora conferta vax. minima p. 95. 



Fig. 2(5. Part of the surface in nat. size. 



Propora canrellata n. p. 95. 



Fig. 27. Part of the surface, nat. size, from Rorkholm, ' Fig. 29. Part of the surface magnified. Vi- 



Estland. » 30. Longitudinal section of the same. Vi- 



5 28. Transverse section. Vi- 



Propora conferta var. p. 94. 



Fig. 31. The corall in nat. size, from the Arachno- 

 phyllum stratum near Wisby. 



Fig. 32. Natnral longitudinal section of the same. Vi- 

 » 35. Transverse section. ^/i. 



Propora sp. indet. p. 98. 

 Fig. 33. Part of the surface, natur, size, .Vlfvaret, wost F'ig. 34. A longitudinal section, cflected through weath- 



of Hulterstad, Öland. 



ering. 



2 A 



