PLATE XII. 



Cyathophyllum Zenkeri, Billings (page 138). 



Figure 1. Longitudinal section of the type specimen, from near Port Colborne, Ont., 

 showing the form of the calyx. 



Cyathophyllum Spenceri, Lambe (page 139). 



Figure 2. A few of the corallites of the type specimen from Dawson Bay, Lake Winni- 



pegosis. 

 Figure 2a. Longitudinal section of one of the corallites ; twice the natural size. 

 Figure 26. Transverse section of the same ; twice the natural size. 



Cyathophyllum clespitosum, Goldfuss (page 145). 



Figure 3. A few of the corallites of the specimen from the Peace River, near the 



mouth of Red River. 

 Figure 3a. Longitudinal section ot one of the corallites, showing the calyx ; twice the 



natural size. 

 Figure 36. Transverse section of the same ; twice the natural size. 



Cyathophyllum Dawsoni, Lambe (page 147). 



Figure 4. Side view of the type specimen from Kennetcook, Nova Scotia. 

 Figure 4a. Longitudinal section of the same. 

 Figure 46. Transverse section of the same. 



Cyathophyllum Pasithea, Billings (page 148). 



Figure 5. Side view of the type specimen from Anse a la Vieille, Baie des Chaleurs, 



Que. 

 Figure 5a. Longitudinal section of the same. 

 Figure 56. Transverse section of the same. 



Cyathophyllum quadrigeminum, Goldfuss (page 153). 



Figure 6. Calyces of a small specimen from the "Ramparts, ' Mackenzie River. 

 Figure 7. Transverse section of a few corallites of a larger specimen from the same 



locality. 

 Figure la. Transverse section of one of the corallites ; twice the natural size. 

 Figure 76. Longitudinal section of the same, showing the calyx ; twice the natural size. 



