PLATE XLII. 



Plkurotomakia. Sp. Undt. (page 313). 



Figure 1. Dorsal view of the specimen from Pentameriis I'oint, Lake Manitoba., 

 referred to in the text. 



Eellerophon Pelops, var. ([>age 317). 



Fignre '2. Side view of an inunature specimen, from the Red Deer Itiver, a mile 

 and a half above the Lower Salt Spring. 



Figxire '2a. Dorsal view of tlie same. 



Figure -S. Outline of transverse section of a specimen from the first small point east 

 of the month of Bell River, in Dawson Ray, to shew the num- 

 ber of volutions. 



PoiiCELLiA "Manitobensis (page 318). 



Figure 4. Side view of the most perfect specimen collected, from Pentamerua 



P<^)int, Lake Manitol)a. 

 Figure 4ft. Dorsal view of the same. 



EuNE:\rA sPECiusuM (page 320). 



Figure :"). Dorsal view of a gutta percha impression of a natural mould of the 

 exterior of a shell of this species from nuc of the small islands 

 m Dawson l>ay. Natural size. By a typographical error, 

 which escaped detecti<m when the table of Frrata on page .Mo9 

 was prepared, it is stated in the text that "the largest example" 

 of this shell, "when ]>erfect, must ha\e been fully ten inches in 

 length." For " ten " read " two." 



Eune;\ia BKEViypiRA (page 320). 



Figure 6. Dorsal view of agutta percha impression of a natural mouhl, in dolomite, 



of the exterior of a shell of this species froui Weston Point, 



Lake Wiimipegosis. 

 Figure 7. Ventral aspect of a gutta ])crcha iuipression of a similar mould of a 



specimen from Net Point, Lake Winnipegosis, shewing tlie 



shape of the aperture, &c. 



EuNEMA SUB8P1NOSUM (page 321). 



Figure S. 1 )orsal view of d gutta percha impression of a natural mould of the 

 exterior of a shell of this species from Dawson Bay, at the tirst 

 suiall point north of the mouth of the R.ed Deer River. Twice 

 the natural size. 



Eu\E>iA c'LATiiRATULUM (page 322). 



Figure !). Dorsal view of a gutta percha iuipressiun of a sharply defined mould of 

 the exterior of an innnature shell of this species fi-oui tlic 

 western shore of Dawson liay, at the uiouth of tlie Red Deer 

 River, six times the natural size. 



AsTRALri'ES FiMiiiiiATUS (page 32 t). 



Figure 10. Doi'sal view of a gutta percha im])ression of a natural uiould of the 

 uj)per surface of a shell of this species from the southern shore 

 of Dawson Bay, four u iles west uf Salt Point. 



Figure lOct. Basal view of the ouly testiferous specimen collected, from the western 

 shore of Dawson l»ay, at the m<)uth of the Red Deer River. 



Figuie 11. Dorsal vii;w, in outline, of a cast of the interior of the shell from tlu' 

 westeru shore of Dawson Hay, at the uumth of Steep Rock 

 River. 



Figure ibf. IJa.sal \'iew of the same, to shew^ the spiral gi'oove M'hich represents a 

 corresponding fold u])on the internal axis of the shell. 



S'I'i;ap\rollina ohtusa (page 328). 



Figure \'2. Dorsal view of a nearly perfect cast of the shell of a spcciuien of tliis 

 species, from Pentamerus Point, Lake Mauitoba. 



Figure 12a. Basal view of the same. 



Figure 18. Dorsal view of a gutta ])crcha impression of a natural uumld of llic 

 exterioi' of a shell of this species from tlie .south end of Rowan 

 Islaiul, in Diiwson liay, to shew tlie surfa-'c ornamentation. 

 'I'wice the natural size. 



