308 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



The ovicell averages 0.25 mm in width, immersed, imperforate, 

 finely granular, with a collar above the aperture. 



Lorenz described the species from Jan Mayen Island, NE of Iceland, 

 160-180 meters. I have not been able to find any other reference to it, 

 except for that of Smitt, whose fig. 75 (PI. 25) is from a Greenland 

 specimen. 



In the Hancock collections is a specimen from Gabriola Pass, British 

 Columbia, presented by Dr. W. A. Clemens. 



Stomachetosella distincta new species 

 Plate 34, figs. 7-8 



Zoarium encrusting on stones and shells, covered with a shining 

 ectocyst. The zooecia are moderately large, 0.65 to 0.85 mm long by 

 0.45 to 0.65 mm wide, very distinct with unusually deep grooves, more 

 or less hexagonal and arranged in quincunx. The frontal highly arched, 

 a thick, finely granulated tremocyst, the pores well separated and tubular ; 

 a rounded umbo situated at some distance from the aperture. The 

 primary aperture varies slightly, usually a little broader than long but 

 often circular; the anter a regular three-fourths of a circle, the poster 

 usually with a broad, shallow sinus, but sometimes evenly arcuate; 

 without cardelles or lyrula; length 0.14 to 0.16 mm, width, 0.16 to 

 0.18 mm. The operculum has the form of the aperture, slightly chiti- 

 nized, with a narrow bordering sclerite and a short sclerite removed 

 from the border on each side for muscle attachment. The peristome is 

 low and the thick frontal wall descends to it gradually without obscuring 

 it. The aperture is located so near the distal end that its distal border 

 appears to be formed by the succeeding zooecium. Avicularia wanting. 



The ovicell is large and rounded, 0.40 to 0.45 mm in width, granu- 

 lated like the frontal and with a rounded umbo on the top, hyper- 

 stomial, not closed by the operculum, except in the transmission of eggs. 



The separating grooves are unusually deep and the distinctness is 

 exaggerated in older parts of the colony by the presence of a brown line 

 at the bottom of the groove. With a tremocystal front wall and a simple 

 aperture which bears no cardelles or lyrula, and the absence of avicularia 

 and spines, this species appears to agree most nearly with the genus 

 Stomachetosella. 



Type, U.S. Nat. Mus., 11027. 



Type locality, oflE Point Barrow, Alaska, 217 feet, G. E. MacGinitie, 

 collector, Arctic Research Laboratory. 



