216 G. LINDSTROM, ON THE SILURIAN GASTROPODA AND PTEROPODA OF GOTLAND. 



Plate V. 



Fig. 1 — 16. Dellerophon sphcera 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 

 lamellae of tlie surface, f. 12 section of a large specimen with exceedingly thick walls around 

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



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

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

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

 sectioned horizontally. 



" 25 — 34. Bellerophoii globulus n., p. 75. Fig. 34 enlarged view of the umbilicus. 



