'224 G. LINDSTHOM, ON THE SILURIAN GASTUOPODA AND riEKOPODA OF GOTLAND. 



Plate IX. 



Fig. 1 — 3. Pleurotomaria dolium n., p. 102. 

 B 4 — 6. 11 laqueata n., p. 102, f. 4 the original specimen belongs to the Museum of the 



School of Wisby, f. 5 — 6 from Klinteberg. 

 » 7 — 10. Pleurotomaria tubidosa n., p. 103 from Kriiklingbo. 

 » 11 — 13. » vaUda n. p. 110. 



I) 14 — 17. » Otiiemensis n. p. Ill, f. 17 the umbilicus seen from above. 



I) 18 — 19. 11 comata n. p. Ill from Eksta. 



» 20 — 29. » cequilatera VVaulenberg p. Ill, f. 20 — 22 the original specimen of Wahlenberg 



from the Mineralogical Cabinet of the University of Upsala, somewhat restored as to the 



aperture and sections of the slit band, f. 2'6 — 24 from Kyrkberget in Wisby, f. 25 — 26 from 



the shale of Wisby, f. 27 ventricose variety from Samsugn in Othem, belonging to the Min. 



Cab. University of Upsala, f. 28 from Samsugn in Othem, f. 29 section of two whorls to 



show the shape and place of the slit band. 

 » 30 — 38. Pleurotomaria labrosa Hall, p 113, fig. 30 — 36 from Westergarn, f. 37 — 38 from Klints 



in Boge. Fig. 30 section along the median axis of the slit band. 



