Zoology.} NATURAL HISTORY OF VICTORIA. [Polyzoa. 



external envelope is very calcareous and brittle, easily separating 

 in fragments or as a shell from the internal parts, and then giving 

 the appearance described and figured by Goldstein. 



Explanation of Figures. 



Plate 107 — Fig. 3, branch, natural size. Fig. 3a, portion, magnified, showing single- and 

 double-celled iuternodes. Fig. 36, back view of a portion of the same. Fig. 3c, small portion, 

 more highly magnified, to show the form of the mouth. 



The type specimens and descriptions of the species on this 

 plate have been contributed by my friend Mr. MacGillivray. 



Frederick McCoy. 



[32] 



