126 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



there is no proximal scutum, and there are numerous frontal avicularia. 



Type,AHFno. 30. 



Type locality, Scorpion Harbor, Santa Cruz Island, California, 2 to 

 3 fms, one well-developed colony. W. G. Hewatt, collector. 



Tricellaria erecta (Robertson), 1900 

 Plate 14, figs. 7 and 8 



Menipea erecta Robertson, 1900 :317 ; 1905 :256. 



Scrupocellaria scabra, Robertson, 1900:318. 



Menipea erecta O'Donoghue, 1923 :1 8 ; 1925 :98 ; 1926:42. 



The form of the zoarium is that of Scrupocellaria, as the internodes 

 are longer, the zooecia more closely set and the branches are broader at 

 their bases than is usual in Tricellaria. 



Zooecia biserial, narrowed below, aperture occupying more than half 

 of the front; margin raised, crenulate, with one of two blunt spines at 

 the outer angle; scutum a flattened spine which is sometimes broadened 

 and bifid. Lateral avicularia often wanting, or feebly developed, or some- 

 times rather large. Frontal avicularia generally present on each zooecium. 

 Ooecia large, globose, more or less striated and imperforate. (After 

 Robertson.) 



The basal zooecia of the branches are shorter than is usual in the 

 genus and the joint sometimes involves the base of the opesia of the 

 outer zooecium. 



The species was described from Alaska and later reported by Robert- 

 son from Puget Sound. O'Donoghue recorded it from numerous localities 

 in British Columbia and Puget Sound. Okada, 1933:215, also records it 

 from the Kurile Islands, Japan. 



It is an abundant species at Point Barrow, Alaska (G. E. MacGinitie, 

 collector, Arctic Research Laboratory). It has not been found in the 

 Hancock dredgings, nor reported south of Puget Sound. 



Genus AMASTIGIA Busk, 1852 

 The zoarium is usually without joints. The frontal surface of the 

 pluriserial branches is convex so that the marginal zooecia are faced 

 somewhat outwardly; the dorsal surface nearly flat. The dorsal heter- 

 ozooecia are avicularia, or vibraculoid avicularia, usually directed toward 

 the midline and more or less proximally. The radicles arise on the mar- 

 gins and pass downward as marginal bundles. Genotype, Amastigia nuda 

 Busk, 1852. 



The genus has not hitherto been recorded from the Eastern Pacific 

 region. 



