NO. 1 OSBURN : EASTERN PACIFIC BRYOZOA — CHEILOSTOMATA 171 



Hancock Stations: 147-34, Tagus Cove, Albemarle Island, Galapa- 

 gos, 30 fms; 133-34, Braithwaite Bay, Socorro Island, west of Mexico, 

 20 fms; 1238-41, off Wilson Cove, San Clemente Island, southern Cali- 

 fornia, 14 to 16 fms. The v^^riter has also collected it on the piles of 

 vi^harves in New^port Harbor, southern California. Also Gulf of Panama, 

 Galtsoff collection, on pearl oysters. 



/^f Beania alaskensis new species 

 Plate 26, figs. 6 and 7 



This species resembles B. mirabilis in form and mode of growth, but 

 is much larger, the tubular proximal end much shorter and thicker, the 

 distal spines are very elongate (nearly half as long as the zooecial body), 

 and the lateral spines bifurcate at the base with the outer branch directed 

 outward and the inner one curved over the opesia. 



The total zooecial length is about the same as that of B. mirabilis, 

 1.00 to 1.10 mm, but the proportions of stalk and body are quite different 

 as the tubular stalk is only one-third as long as the body, and the stalk 

 is comparatively thick, 0.10 mm in diameter (0.05 mm in mirabilis). 

 The very elongate terminal spines and the double lateral ones are also 

 striking differential characters. 



Type, AHF no. 42. 



Type locality, Shuyak Strait, Afognak, Alaska, "U. S. National Mu- 

 seum 85/652." 



n: Beania magellanica (Busk), 1852 

 Plate 25, fig. 9 



Diachoris maffellanica Busk, 1852:54; 1884:59. 

 Beania magellanica, Harmer, 1926:412. 



The zoarium forms a network, or reticulum, the zooecia being sepa- 

 rated from each other by fenestrae about one-third as large as the zooecia. 

 The lateral connecting tubes vary somewhat, but average about 0.15 mm 

 in length. Each zooecium begins in a narrow tube arising from the dorsal 

 side of the preceding one and suddenly expanding into the "boat-shaped" 

 zooecium. The zooecium (body) is moderately large, 0.65 mm long by 

 0.30 to 0.40 mm wide, slightly narrowed at the distal end where it pro- 

 jects above the succeeding one, and the opesia occupies the whole of the 

 frontal surface. Vestigial spines are present, two at the distal end and 

 one (occasionally two) on either side of the operculum. The avicularia 

 are large and somewhat elongated (about 0.35 mm in length), with a 



