464 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



Genus GHEILOPORA Levinsen, 1909 



Ovicell endozooecial. Frontal perforated, thin, inflated; the peri- 

 stome somewhat tubular; aperture large, without cardelles; avicularia 

 sometimes present at the side of the aperture. Genotype, Discopora 

 sincera Smitt, 1868:28. 



Cheilopora praelonga (Hincks), 1883 

 Plate 56, fig. 8 



Mucronella praelonga, Hincks, 1884:27. 

 Mucronella praelonga, O'Donoghue, 1923:46. 

 Cheilopora praelonga, O'Donoghue, 1926:73. 



Zoarium encrusting or erect and bilaminar. Zooecia large, elongate 

 and somewhat tubular in form; averaging about 0.90 mm but ranging 

 all the way from 0.65 to 1.10 mm long by 0.40 to 0.50 mm wide; the 

 front a tremocyst with numerous large pores. The primary aperture is 

 round, without cardelles, about 0.26 mm long and wide. The operculum 

 has the form of the aperture, thin and with a narrow bordering sclerite. 

 The peristome is high, tubular, thin-walled, the secondary aperture 

 similar to the primary except for the presence of a small, sharp triangular 

 denticle high up in the middle of the proximal border. The proximal 

 border of the persistome is often elevated above the denticle into a broad 

 process which terminates in one or more points, and the distal lip may 

 also be extended into a long process ; in our material these processes are 

 not developed to the extent figured by Hincks, plate 4, fig. 2. No 

 avicularia, no spines and no external evidence of the ovicells. 



Hincks described the species from Houston Stewart Channel and 

 O'Donoghue recovered it from numerous localities in British Columbia. 



It was not taken during the Hancock Expedition, but from material 

 sent me for identification I have the following records: 



Masste Inlet, British Columbia, E. F. Ricketts, collector; Friday 

 Harbor, Puget Sound, Dr. Alice Robertson, collector (Miss Robertson 

 did not mention the species, but in some of her Friday Harbor material 

 I have found a small specimen) ; Seattle, Tacoma and Indian Island, 

 Washington, in material sent me for identification by the W. F. Clapp 

 Biological Laboratories. Intertidal to 20 fms. 



Cheilopora praelucida (Hincks), 1884 



Mucronella praelucida Hincks, 1884:26. 

 Mucronella praelucida, Osburn, 1912a :283. 



