66 



THE GENUS MONTICULIPORA. 



are quite circular ; the others {cancelli), disposed more or less 

 regularly round these, generally to the number of seven or 

 eight, are more or less angular, and the border of the opening 

 is never raised" (Busk, loc. cit.) 



Mr Busk considers his H. neozclanica to be probably 

 distinct from H. pcliiculata, Waters, on the ground (i) of 

 certain differences in the general form of the polyzoary, and 

 (2) of the absence in the former of any external calcareous 

 pellicle covering the surface, though there exists, in perfectly 

 preserved parts of the specimen described, a thin chitinous 

 covering closing the mouths of the tubes. Mr Waters, as 

 before remarked, is inclined to believe that the two forms are 



Fig. 8. — A, A fragment of the polyzoary of Heteropora neozclanica. Busk, of the natural size 

 (original). B, A portion of the surface of the same, apparently somewhat altered by 

 maceration in sea-water, greatly magnified (original). C, A portion of the surface of the 

 same (copied from Busk), apparently in a more nearly natural state, greatly magnified. 

 Both B and c show the apertures of the zocecia and cancelli. D, Portion of the surface 

 of H. pellictdata, Waters (copied from Waters), enlarged 25 times, and showing the 

 zocecia and cancelli. In the upper part of the figure the cancelli (and the zooecia 

 partially) are closed by a calcareous pellicle, which is wanting on the right-hand side 

 of the figure. 



Identical, in which case the name H. neozelanica will have to 

 be abandoned. In fig. 8, b and c, I have figured the two 

 states of the surface which my specimen of H. neozclanica 



