PLATE XXV. 



Tmmbeella Ekwanensis (page 249). 



Figure 1. Outline of a brachial valve of a specimen of this species, from the Silurian 



limestone of the Ekwan River, with part of the test preserved and 

 slightly reduced in size. The vertical line on the left shews the actual 

 length. 



Figure 2. _ Outline of a cast of the interior of a large brachial valve of a shell of this 

 species, from the same limestone, slightly restored, and reduced a little 

 in size. The vertical line on the right shews the actual length. 

 Both of the figures of this species are from drawings by Mr. C. V. King. 



Teimeeella boeealis (page 250). 



Figure 3. Outline of the supposed dorsal side of a cast of the interior of both valves 



of a specimen of this species, from the Ekwan River, shewing the im- 

 press of the brachial valve, and slightly restored. 

 M ?> a Outline of the supposed ventral side of the same specimen, shewing the 

 impress of the pedicle valve. 

 The two figures of this species, also, are from drawings by Mr. C. F. King. 



Camaeotcechia Ekwanensis (page 252). 



Figure 4. Dorsal view of the type of this species, a well preserved cast of the interior 



of both valves of a specimen from the Ekwan River, shewing the shape 

 and surface markings of the dorsal valve, and the beak of the ventral. 



fi 4 a Front view of the same specimen, shewing the comparative convexity 

 of both valves, and the well defined sinus in the ventral valve. 



n 4 h. Ventral view of the same specimen. All three figures, three times the 

 natural size, 



Camaeotcechia (?) Winiskensis (page 272). 



Figure 5. Dorsal view of a small and evidently immature specimen from the Silurian 



limestone of the Winisk River, with both valves preserved. 



Figure 6. Exterior of the ventral valve of a large and apparently adult specimen, 



also from the Winisk River. 



Figure 7. 



Camaeotcechia coalescens (page 272). 



Ventral side of the best specimen of this species known to the writer,from 

 the Winisk River ; three times the natural size. 



Rhynchospiea Lowi (page 277). 



Figure 8. Dorsal view of a specimen of this species, from the Silurian limestone of 



the Fawn River, shewing the whole of the dorsal valve, and the umbo 

 and perforate beak of the ventral. 



Figure 9. Exterior of the ventral valve of another specimen from the same locality. 



Both figures twice the natural size. 



