166 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



the opesia. Pedunculate avicularia situated near the base, those on the 

 outer margins considerably larger than those on the inner zooecia of a 

 frond. 



The ooecia are large, subglobose and marked by radiating lines. 



This is a widely distributed species in northern seas. It shows much 

 variation in the manner of growth, the typical form having erect or some- 

 what recumbent broad frond-like branches; the variety fruticosa (Pack- 

 ard) with narrower strap-like branches, and the variety quadridentata 

 (Loven) uniserial to quadriserial, with all possible intermediate varia- 

 tions linking these different growth forms together. 



Hincks, Robertson and the O'Donoghues have recorded the species 

 at numerous localities from the Bering Sea to Puget Sound. 



The species was not taken in the dredgings of the Allan Hancock 

 Pacific Expeditions, but there is a specimen in the collections from Pavlov 

 Bay, Alaska. Also in the material from the U. S. Alaska Crab Investiga- 

 tion, the varieties fruticosa and quadridentata occurred together at sta- 

 tions 60-40, Leonard Harbor, Alaska, 20 to 25 fms, and 139-40, off 

 Hallo Bay, Alaska, 28 to 40 fms. It is an abundant species at Point Bar- 

 row, Alaska, G. E. MacGinitie, Arctic Research Laboratory. 



''^ ■ Dendrobeania curvirostrata (Robertson), 1905 

 Plate 25, figs. 7 and 8 



Bugula curvirostrata Robertson, 1905 :272. 



Bugula curvirostrata, O'Donoghue, 1923 :21 ; 1925 :99 ; 1926 :45. 



The growth habit is much like that of D. murrayana var. fruticosa 

 (Packard), with strap-like branches consisting of about 4 to 8 series of 

 zooecia. The spines are much weaker than in murrayana, often reduced 

 to merely the projecting distal angles. Lateral spines are often wanting, 

 but a short nearly erect weak spine may be present on one or both sides 

 opposite the operculum. The most important differential character ap- 

 pears to be the form of the avicularium, which is much longer than that of 

 murrayana, especially the beak. Both the beak and the mandible are so 

 much curved that they meet only at their tips. This applies to both the 

 large border avicularia and the smaller ones on the inner zooecia. 



Robertson did not obtain it north of Monterey Bay, California, but 

 O'Donoghue lists it for a number of localities in Puget Sound and British 

 Columbia, at 6 to 20 fms. 



Hancock Stations: 997-39, White Cove, Santa Catalina Island, 36 

 to 41 fms; 1150-40, Avalon Bay, Santa Catalina Island, 93 to 110 fms; 

 1187-40, off Bird Rock, Santa Catalina Island, 31 to 40 fms; 875-38, 

 northwest of Anacapa Island, 50 fms; 990-39, San Miguel Passage, 37 



