PLATE \LIII. 



EuoMPiiALUs (Steaparollus) annulatus (page 324). 

 Figuru ]. View of the upper surface of a specimen from IV-ntainerus Point, Lake 



j\Iainto)ja. 

 Figure la. A portion of the same enlarged. 

 Figure 2. Outline of transverse section of a specimen from a small island north 



north-west of Beardy Island, in Dawson Hay. 



Euo.MPHALUS (Phanekotinus). Sp. Undt. (page 325). 



Figure .">. View of the exposed portion of the specimen from a small island off 



Weston Point, Lake Winnipcgosis, referred to in the text. 

 Figure .S«. Outline of transverse section of the same. 



EuoMPHALUs (ciECULARis? var.) suii'iRiottXALis (page 320). 



Figure 4. Front view of a cast of the interior of a shell of this species from Snake 

 Island, Lake Winnipegosis. 



< )'\iPiiALOCiR]!U.s Manitobknsis (page 327). 



Figure .*>. Diagrammatic represeuta.tion of the upper side of the shell of tliis species, 



drawn from wax impressicnis of a numher of natural moulds, 



in dolomite. 

 Figure 6. View of the lower surface of a si>ecimen from Whiteaves Point, Dawson 



Bay, drawn Irom a wax impression of a mould of the exterior 



(jf the shell, ii) dolomite. 

 Figure (x(. View of the peripheral portion of the same. 

 Figure 7. Front view of a '' loose '' specimen fnjui a small point three miles north 



of the ]n(iuthof Bell Rivei', Daw,son Bay, in outline only, drawn 



from a Max impression of a natural mould of the exterior of 



the shell. 



Pal^acm.ea (?) ciNraiLATA (page 311). 



Figure S. Dorsal asjiect of tlie most perfect specimen coUecteil, from the western 



shore of Dawson Bay, a.t the niouth of the Red Deer River. 

 Figure Str. Lateral view of the same. 



pLAi'vciiJiAs (Ortiionycjjia) i'ar\ulum (page 331). 



Figure 9. Side view of a specimen from one of the small islands in Dawson Bay. 

 Figure 10. Side view of a specimen from another small isliiud in Daw.son Bay. 

 Figure 11. Similar view of anotlier s[iecimen fi'om the same locality as the last. 



Platvosto.ma tumidum (page 331). 



Figiii'e r2. Dorsal view of the most perfect specimen cf)llected, from Pentamerus 

 Point, Lake Maiiitoha. 



Plkurotomaria 8pen('KR1 (page 341). 



Figui'e 13. Dorsal a.s]ject of a small shell, su])i)<)sed to he the young of this species, 

 from Pentamerus Point, Lake Manitohii,. Twice the natural size. 



Naticophis tnorxata (page 333). 



Figme 14. Dorsal view of tlie ty])e of this species, from a small island in Dawsou 

 Bay, north north-west of I'.canly Island. 



