702 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



2. Ooeciostome hooded over the top and opening on the side; 



tubules distinct, high on proximal border and with one to 



several sharp points canaliculata 



Ooeciostome vride open 3 



3. Zooecial tubules not connate and, except near the center, they 



are usually scattered or in quincunx verrucaria 



Zooecial tubules in series only, connate to the tips 4 



4. Cancelli distinctly larger than the zooecial apertures; radii in 



regular series; pin-head spicules abundant . . novae-zelandiae 

 Cancelli smaller; radii regular only close to the central area; 

 very complex and intricate colonies formed by lateral bud- 

 ding; pin-head spicules almost wanting intricata 



Lichenopora canaliculata (Busk), 1876 

 Plate 76, figs. 3 and 4 



Discoporella canaliculata Busk, 1876:118; 1879:199. 

 Lichenopora grignonensis, Ridley, 1881:57. 

 Lichenopora fimbriata, Borg, 1926:184. 

 Lichenopora canaliculata, Borg, 1944:235. 



Busk's description is very brief, "Zoarium circular, bordered, slightly 

 convex; tubes very irregularly uniserial, with a raised canalicular fillet 

 on one side, interspaces cancellous." Borg, 1944:235, had very rich 

 material from the Swedish Antarctic Expedition and has given an ex- 

 tended discussion of the species. 



The zoaria are circular, somewhat elevated at the center and sloping 

 regularly to the basal lamina which is broad and thin ; encrusting on 

 shells and attached to stems. The basal lamina is traversed nearly to 

 the edge by the bases of young zooecia. The central area of the zoarium 

 is comparatively small, a little depressed in the young, but later filled 

 in by the flat-topped brood-chamber. The zooecial tubes are irregularly 

 distributed or in short radiating lines and never connate; they are 

 moderately high, usually much elevated on the proximal (central) side 

 and low on the side toward the border, thus forming a channel above 

 the aperture; the proximal side with one to several "fillets" or longi- 

 tudinal ribs which end in points; aperture rounded and 0.10 to 1.12 

 mm in diameter. The cancelli are large and irregular in form, often 

 twice as large as the apertures of the zooecia, the walls thin and the 

 whole giving a reticulated appearance. 



