626 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



situated terminally, between but not in contact with the adjacent peri- 

 stomes; it is rounded or slightly elliptical transversely, short, erect or 

 slightly bent proximally; the aperture 0.06 mm in diameter. 



Described from Mount Desert Island, Maine, and recorded by Osburn 

 from the Bay of Fundy and the Gulf of St. Lawrence (for details see 

 Osburn, 1933:13). 



Point Barrow, Alaska, Arctic Research Laboratory, to a depth of 

 50 fms, G. E. MacGinitie, collector, common on shells. 



Oncousoecia ovoldea new species 

 Plate 65, figs. 8 and 9 



The zoarium is broadly flabellate; the ancestrula produces a single 

 short tubule; from this two tubules arise, and then four tubules begin 

 the wide expansion. They are arranged in quincunx, the peristomes all 

 well separated. The embedded tubules are about 0.13 mm in diameter, 

 the peristomes 0.11 mm and the apertures 0.08 mm. The tubules are 

 very definitely cross striated, the peristomes smooth and semierect, the 

 longest ones 0.13 mm. 



There are two ovicells on one colony, the expanded portion ovate, 

 ventricose, 0.15 to 0.18 mm in width, the distal end rounded, the ooecio- 

 stome terminal, short, erect, the aperture rounded and 0.05 mm in 

 diameter. The proximal part of the gonozoid is like the other tubules 

 for about half or two-thirds of the length and the expansion appears 

 suddenly. 



Type, AHF no. 58. 



Type locality, Hancock Station 276, San Esteban Island, Gulf of 

 California, 28°38'30''N, 112°36'W, at 32 fms. Two colonies encrust 

 smooth shell fragments, while a third is on the rough pebbled surface 

 of an echinoid spine; the largest colony is less than 2 mm in width. 



Oncousoecia abrupta new species 

 Plate 65, figs. 6 and 7 



The zoarium is small, delicate and entirely adnate; the proximal por- 

 tion very slender (0.45 mm at the widest part) for a distance of 5 mm, 

 then abruptly becoming broad and round, about 2.5 mm in either direc- 

 tion. The proximal part, just above the pro-ancestrula, which is wanting, 

 is 2 tubules in width, alternating, and widens to 4 tubules near the 

 expansion; the peristomes moderately short and free. On the expanded 

 area the peristomes are much higher (to 0.50 mm), rather regularly 



