Plate XIX. 



Fin. 67. Halecium annulatum. 

 A. Natural size. 



1). Colony showing mode of branching, hyrlrotheca?, etc. 

 C. (ionophore (After Torrey). 



Fig. 68. Halecium articulosmn. 



A. Natural size. 



B. Portion of branch. 



C. Gonangium. 



Fig. 69. Halecium corrugatum. 



A. Natural size. 



B. Colony showing hyrlrotheca* and hydranths. 



C. D. Gonophores. 



Fig. 70. Halecium densum. 



A. Natural size. 



B. Terminal portion of branch. 



