178 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.14 



The ooecium is small and low and the distal spines are usually fused 

 with it on the sides. 



It is a common species on both sides of the North Atlantic, down to 

 Cape Cod, Massachusetts, in the high Arctic it extends from the Kara Sea 

 to the American Arctic, and has been recorded by O'Donoghue at several 

 localities in British Columbia. 



Collected by the "Albatross" at Cordova, Alaska, June 28, 1914, 

 specimens in the National Museum and the Hancock collections. Also 

 common at Point Barrow, Alaska, G. E. MacGinitie, collector, Arctic 

 Research Laboratory. 



Gribrilina corbicula (O'Donoghue), 1923 



Membraniporella corbicula O'Donoghue, 1923:30. 

 Gribrilina corbicula, O'Donoghue, 1926:51. 



Zoarium forming rough light brown patches on the leaves of Zostera. 

 Zooecia of moderate size, oval and closely packed. Pericyst formed by 6 

 or 7 pairs of spines, uniting in the midline and at several points on each 

 side, leaving 3 or 4 lacunar pores in each groove, presenting the appear- 

 ance of basket-work. The aperture is semicircular, the apertural bar 

 forming a sort of lip. Oral spines 3 or 4. Ovicell small, hemispherical, 

 with 2 minute frontal pores; another pair of broad ribs grows across 

 it and almost hides the ovicell. (Condensed from O'Donoghue's two 

 accounts.) 



This may be a different species, as O'Donoghue states that it is "a 

 much larger form than C. annulata.^' However, the nature of the small 

 ovicell and the apertural bar and frontal rib of the ovicell in the form 

 of raised lips suggest a close relationship to that species. Recorded from 

 Nanaimo, Victoria and Nanoose Bay, British Columbia, by O'Donoghue. 

 Not in the Hancock collections. 



Genus REGINELLA Jullien, 1! 

 Zooecia with the frontal formed by voluminous ribs much in relief 

 on the exterior surface, with the pores diminishing in size from the talon 

 of the rib to its extremity ; between each pair of ribs transversely is found 

 a furrow often as broad as the rib, at the bottom of which each pore 

 occupies the middle of a calcareous polygonal cell. These intercostal fur- 

 rows traverse entirely the zooecium and separate completely each pair 

 of transverse ribs. Orifice arched in front with the inferior lip mucro- 

 nated, marginal spines. Avicularia unknown (Transl. Canu and Bassler). 

 Genotype, Cribrilina furcata Hincks. 



