510 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



Gostazia surcularis (Packard), 1863 

 Plate 63, figs. 1-3 



Celleporaria surcularis Packard, 1863 :410. 



Cellepora incrassata Smitt, 1867 -33 (non incrassata Lamarck). 



Cellepora cervicornis. Busk, 1856:32. 



Cellepora incrassata, Hincks, 1884:29. 



Cellepora surcularis, Osburn, 1912a :281. 



Cellepora incrassata, Robertson, 1900 :327 ; 1908 :312. 



Cellepora surcularis, Nordgaard, 1918:86. 



Cellepora incrassata, O'Donoghvie, 1923 :47. 



Schizrnopora surcularis, Osburn, 1923 :12D. 



Costazia incrassata, O'Donoghue, 1926 :74. 



The zoarium is erect from a small base, branching irregularly to a 

 height of 50 mm ■ the basal stem as much as 3 or 4 mm in diameter, the 

 branches varying in size, rounded at the tips. The zooecia are somewhat 

 oriented at the growing tips, but otherwise more or less erected, mod- 

 erately large and coarse, about 0.45 mm across the erect ones; heavily 

 calcified, the frontal with a conspicuous row of areolar pores and occa- 

 sionally with a few additional pores, all of which are carried upward 

 by the thickening of the front wall. The peristome is usually low, thick- 

 walled, with the usual small avicularia, one on each side, sometimes 

 rising above the border of the peristome. There are rather infrequent 

 vicarious avicularia, short spatulate in form and averaging about 0.40 

 mm long by 0.18 mm wide at the widest part; these are little or not 

 at all erected. The primary aperture is short-oval, slightly narrower 

 proximally, with a small v-shaped sinus, and measures about 0.18 mm 

 long by 0.14 mm wide. 



The ovicell is hemispherical, 0.30 mm wide, at first prominent but 

 later more or less embedded, with the usual semicircular perforated area, 

 the pores radiating; as calcification proceeds the secondary layer may 

 almost or quite obscure the perforated area. 



This species is evidently not the Cellepora incrassata of Lamarck, 

 with which it has been confused, nor the Millepora cervicornis of Pallas. 

 While Packard's description is incomplete, it is clear enough under the 

 circumstances, for the species is common on the Labrador coast and there 

 is no other in that area with which it could be confused. Moreover, in 

 naming this species Packard realized that he was dealing with the 

 common northern form, as he wrote, "European authors have confounded 

 this arctic species with Cellepora cervicornis of the Mediterranean Sea." 

 It may be confused with C. ventricosa, but the latter species is much 



