64 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



8. Spines usually 7 on each side, distal ones erect, proximal ones di- 



rected somewhat forward, meeting over opesia. . . . craticula 

 Spines 5 or 6 on each side, directed more laterally and not meet- 

 ing over the opesia lineata 



9. Lateral avicularia elevated, at the side of the operculum. . armata 

 Lateral avicularia proximal to the operculum, little elevated ; 



ovicell very small inconspicua 



Gallopora armata O'Donoghue, 1926 



Plate 6, fig. 10 



Callopora armata O'Donoghue, 1926:34. 



The zoarium is moderately thin, encrusting and white. Zooecia dis- 

 tinct, with occasional small interzooecial fenestrae ; moderate in size 

 (0.50 to 0.60 mm long by 0.26 to 0.30 mm wide) ; the opesia elliptical 

 (0.35 to 0.40 mm long by 0.30 to 0.26 mm wide), constricted rather 

 sharply at the operculum which is 0.13 to 0.15 mm in width. The walls 

 are moderately thick, the mural rim low and smooth ; the descending 

 cryptocyst thin but conspicuously and evenly crenate to the region of the 

 operculum ; gymnocyst occupying about one-fourth of the frontal length. 

 Spines: a small erect one at each distal corner, along each side 4 or 5 

 more or less arched over the opesia, and a similar median proximal spine. 

 Avicularia: one of moderate size on the front of the gymnocyst, often 

 replaced by a pair of smaller ones ; one on each side near the distal corners 

 with the mandible directed forward and inward; occasionally an addi- 

 tional small avicularium on one or both sides at about the middle of 

 the opesia. 



Ovicell hyperstomial, somewhat immersed, the ectooecial layer not 

 quite complete, slightly granular and without transverse rib; the avicu- 

 larium distal to the ovicell is only slightly enlarged. 



This description differs somewhat from that of O'Donoghue, especi- 

 ally in the number and arrangement of the avicularia, but as he found 

 no ooecia he was doubtless describing a younger stage. Some doubt is 

 therefore attached to the present identification. The species was described 

 from a single specimen from Bull Passage, British Columbia in 30-35 

 fms. The general appearance of this species is similar to that of Tegella 

 arctica (d'Orbigny), but it differs in the possession of pore chambers and 

 in the nature of the ooecial cover. 



Off Cadboro Bay, British Columbia, several colonies collected by G. 

 E. MacGinitie. 



