164 MADKHPOKAKIA. 



2. The form lettererl ,/■. h, from some unknown locality, shows a regularity of forking 

 closely recalling that of some of the West Indian Pontes. 



r>. (('//// mjard to the C'aliclcs. 



Two new forms, G. Great Barrier Reef 15 and G. North-West Australia 7, show in 

 different ways that calicles may be varied in an astonishing manner by accidental variations 

 in the form of the growth. This interdependeiifc of the two has already been discussed, see 

 Vol. IV. p. 187. 



