CLASSIFICATION OF THE SPECIES 257 



of Jenny Island, near Adelaide Island; Palmer Archipelago; off Queen Mary Land; 

 McMurdo Sound, Ross Sea. 



C. levinseni, Harmer. Colony reddish orange, slightly branched. Width of branch 

 not including peristomial tubes 3 to 5 mm. Ostia numerous, each leading into a tube 

 that ends blindly in the middle part of the branch. Peristomial tubes projecting beyond 

 the general surface about 4 mm. Length of zooids 2-5 mm. Colour of preserved zooids 

 whitish. Arms six pairs; no. end-swellings with refractive beads. Off west coast of 

 Japan, at the south end of Corea Strait. 



C. evansi, Ridewood. Colony massive, branching, coenoecium friable, cream coloured, 

 speckled, containing large quantities of shells of Foraminifera, and fragments of shells 

 of Molluscs and Echinoids. Ostia at the end of tubular peristomes that project 2-5 to 

 4-5 mm. from the surface of the branch. Length of the zooids 3-5 mm. Colour of 

 preserved zooids, pale green or white. Arms usually eight pairs, no end-bulbs with 

 refractive beads. Buds up to nine. New Zealand, Three Kings Islands. 



C. gilchristi, Ridewood. Colony of long branches, some of the branches connected 

 across by solid bars. Width of terminal branches 5 to 8 mm., colour brown or pale 

 brown. Ostia numerous, except on main stem. Spine-like processes on the coenoecium 

 numerous, slender, simple or forked. Zooids i-6 to i-8 mm. Colour of preserved zooids 

 brown. Arms usually six pairs; no end-swellings with refractive beads. Off Cape St 

 Blaize, Knysna Heads ; Cape St Francis ; East London ; other localities on the south 

 coast of Cape Colony, South Africa. 



C. agglutinans, Harmer and Ridewood. Colony massive, branching. Coenoecium 

 friable, cream coloured, speckled, opaque, containing large quantities of shells of 

 Foraminifera, fragments of shells of Mollusca and spines of Echinoids and rounded 

 particles of slate. No peristomial tubes. Each ostium with a thick lip or spine that 

 projects about 3 mm. beyond the general surface. Each ostium leading into a tube that 

 communicates at its inner end with a tubular labyrinth in the middle part of the branch. 

 Length of the zooid 4-5 mm. Colour of preserved zooid blackish, arms eight or nine 

 pairs, no end-swellings with refractive beads. Burdwood Bank, south of Falkland 

 Islands. 



Sub-genus Demiothecia, Ridewood 



Colony branching. Each ostium leading into a cavity which is continuous through the 

 colony, and is occupied in common by the zooids and their buds. The walls of the 

 coenoecial cavity usually of irregular thickness and sometimes with inwardly projecting 

 bars and ridges. 



C. dodecalophus, M'Intosh. Colony irregularly branched and straggling; some of 

 the branches fusing to form a network, the cross-bars being usually solid. Coenoecium 

 pale orange-brown or colourless; width of branch excluding spines, 3-5 to 6 mm.; 

 cavity of coenoecium continuous, but partially divided up by bars and incomplete 



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