100 POLYZOA. 



(6.) Divided into Branching Lobes. 



69. E. platalea, Busk, I.e., p. 90. Cells ovate, acute inferiorly, 

 with, a depressed area below the mouth in front, at the bottom of which 

 is a simple pore ; avicularia irregularly scattered over the polyzoarium, 

 rare, with a spoon-shaped inaudible. 



Australia. 



70. E. lichenoides, Milne-Edwards ; BusJc, I.e., p. 90. Cells 

 ovate, punctured in the centre by three to four stellate pores, which 

 soon coalesce into a single. apparent opening; mouth sub-orbicular; 

 a small prominent avicularium on each side immediately below the 

 mouth, looking outwards. 



Australia. 



RETEPORA. 



Polyzoarium foliaceous, reticulate, infundibuliform or contorted, 

 Bub-pedunculate ; cells decumbent, opening on the upper surface only. 

 Europe. Cape Horn. Australia. 



71. R. cellulOSa, Bu*k, I.e., p. 93 ; R. retieulata, Johnston, I.e., 

 p. 353. Polyzoarium turbinate or crateriform, undulated, curled : cells 

 sub-cylindrical, surface smooth; mouth sub-orbicular, lower lip pro- 

 jecting, with an avicularium on one side ; surface strongly vibicate ; a 

 papilliform avicularium at the lower angle of the fenestrse. White. 



Chatham Islands. Europe. Cape Horn. Australia. 



HEMESCHARA. 



Polyzoarium foliaceous, contorted, or laminar, composed of a single 

 layer of cells disposed quiucuncially, and opening on one surface only. 

 Marion Islands. 



72. H. fairchildi, sp. nov. Cells ovate, immersed, granular, 

 punctured round the edge ; mouth simple, lower lip straight or with a 

 sinus ; occasionally with an avicularium on one side of the mouth ; 

 ovicell globose, granular. White. 



Cook Strait. 



Forming an easily detached crust on dead shells. 



Sub-order Cyclostomata. 



Cells tubular ; orifice terminal, of the same diameter as the cell, 

 without any moveable apparatus for its closure ; consistence calcareous. 



FAMILY CRISIID^;. 



Polyzoarium divided into distinct internodes, usually connected by 

 flexible joints ; attached by horny tubes. 



CRISIA. 



Cells in two rows, sub-alternate ; aperture entire. 

 All parts of the world. 



73. C. eblimea, Linnaeus ; Johnston, I.e., p. 283. Cells loosely 

 aggregated, cylindrical, bent, with scattered pores ; orifice free ; ovicell 

 pear-shaped, dotted. 



Europe, California. 



