216 G. LINDSTRÖM, ON TIIE SILURIAN GASTROPODA AND PTEROPODA OF GOTLAND. 



Plate v. 



Fig. 1 — 16. Bellerophon sphara n., p. 74. Fig. 3 cast of »dorsal» part with the elevated slit band and section 

 of the same, f. 4 the same from the side, f. 7, surface of a variety with lateral view and 

 section, f. 8 slit band enlarged, f. 10 section of the innermost whorls, with the hooklike 

 laraellie of the surface, f. 12 section of a large speciraen with exceedingly thick walls around 

 the umbilicus, f. 13 — 16 details of surface sculpture around the umbilicus. 

 » 17 — -24. Bellerojjlion squamosus n., p. 78. Fig. 17 — 19 specimen in nat. size, f. 20 smaller speciraen in 

 natural size and its slit band in f. 21, f. 23 section of the shell with the thin laraellar processes 

 from the lines of growth, f. 24 curves formed by the extreme edges of these lines of growth, 

 sectioned horizontally. 

 » 25 — 34. Bellerophon globulus n., p. 75. Fig. 34 enlarged view of the umbilicus. 



