PLATE XXXVI. 



PiNACOTRYPA MAECilNATA (page 278). 



Figure 1. A perfect zoarium of this speoie.s, from a small island in Daw- 

 son Bay, as viewed from al:)ove, and shewing five 

 macula?. 



Figure la. Portion of the same, three times the natural size, shewing 

 one of the maculiv, &c. 



Figure lb. Another specimen from the same locality, four times the 

 natural size, shewing the at first recumbent but 

 ultimately erect zoueoia, the Ijroad and longitudinally 

 striated basal lamina, A:c. 



Cystodictya Hamiltonensis (page 279). 



Figure 2. Outline of a portion of the zoarium of this species, from asmall 

 island in Dawson Bay. 



Figure 2a. The same specimen, enlarged three times, and shewing the 



details of its structure. 

 Figure 26. Portion of the same, enlarged eight times. 



FiNESTBLLA VERA (page 279). 



Figure 3. Side view of the outer or non-celluliferous surface of the 

 zoarium of a specimen of this species, from a small 

 island in Dawson Bay. 



Figure 3a. Portion of the same, enlar'ged five times, with the right side 

 partly scraped down to show the zoa^cia. 



Fene.stella, like F. dispaxda (page 279). 



Figure 4. Outline of a specimen of this specie.s, from the south-eastern 

 shore of Dawson Bay, at Whiteaves Point. 



PoLVPOKA (poROSA ? var.) Manitobexsis (page 280). 



Figure 5. Portion of a zoarium of this species, from Moni-oe Point, Lake 

 ^lanitolja, four times the natural size, shewing the 

 non-celluliferous side, but with the lower part scraped 

 down to show the zocecia. 



