PLATE XXX. 



Steophostylus amplus (page 262). 



Figure 1. Ventral view of a specimen of this species, from the Ekwah limestone, shew- 

 ing the large size of the aperture and other characters of the base of the 

 shell. 

 .1 1 a,. Dorsal view of the same specimen, shewing the small, short spire, and the 

 large outer volution. 



Steophostylus inflatus (page 262). 



Figure 2. Dorsal view of the large specimen from the Ekwan River, from which the 



original description of this species was made. 

 Figure 3. Similar view of a " large testiferous specimen " from the same locality, that 



is referred to in the text as *' probably referable to this species." 



Steophostylus filicinctus (page 263). 



Figure 4. Dorsal view of an imperfect cast of the interior of a shell of this species, from 

 the Ekwan River, with a small portion of the test preserved at the an- 

 terior end of the last volution. 



Figure 5. Similar view of a cast of the interior of the shell of a specimen, from the 

 Ekwan, that is probably referable to this species. 



Figure 6. Dorsal view of a cast of the interior of the shell of a small specimen of this 

 species, also from the Ekwan River, with a considerable portion of the 

 test preserved. 



AcTiNOCBRAS KnEWATiNENSE (page 246). 



Figuie 7. Side view of the best specimen of the siphunole of this species that the 

 writer has seen, from Rainy Island, in the Attawapiskat River, which 

 shews ten of the siphuncular constrictions. 



Figure 8. Longitudinal section of another portion of a siphuncle from Rainy Island, 

 shewing indications of " organic deposits" therein. 



Spyroceras meridionale (page 281). 



Figure 9. Side view of the type and only known specimen of this species, from Stone- 

 wall, Manitoba. 



