524 PROCEEDINGS OF THE NATIONAL MUSEUM vol.84 



Specimens examined. — Okhotsk Sea (stations 5016 and 5017), 

 mimerons frajjments; two of Dr. Broch's types. 



Remarks. — It is noteworthy that the bottom temperature at station 

 5016 was 29.8° F., therefore lower than at the type locality. 



Dr. Broch examined one of my specimens from station 5016 and 

 identified it as pacifica. It is nevertheless rather different from his 

 material. Added to this is the confiisinp; matter of two gastrostyle 

 sizes in my specimens. If these are all one species, it i3 certainly 

 a variable one. 



Dr. Broch writes me that the record of pacifica from 60 fathoms. 

 Strait of Georgia, pertains to A. verrilli. 



ALLOPORA CAUFORNICA Verrill 



Plate 58; Plate 61, Figures 3-36 



Allopora calif arnica Verrill, Proc. Essex Inst., vol. 5, no. 3, p. 37, 1866; Trans. 

 Connecticut Acad. Arts and Sci., vol. 1, p. 516, pi. 10, fig. 8, 1868. — Fisheb, 

 Ann. Mag. Nat. Hist., ser. 10, vol. 8, p. 392, pi. 15, figs. 3-3b, 1931, 



Diagnosis. — Cyclosystems flush, very numerous, with slightly 

 raised margin and 4 to 8 (ordinarily 6 or 7) unequal, prominent dactyl- 

 otomes slightly constricted adjacent to gastropore; gastropore nar- 

 rowly funnel-shaped, moderately deep, the bottom occluded by promi- 

 nent, ovoid, gastrostyle; ampullae close to surface but not forming 

 raised blisters. Colony palmate arborescent without differentiated 

 anterior and posterior faces. 



Description. — The type colony is 140 mm high and 125 mm broad; 

 a comparable one from Monterey Bay, Calif., is 270 mm broad by 

 180 mm high (pi. 58; U.S.N.M. no. 43275). Another colony from 

 Monterey Buy, which is perhaps a record for size, measures 290 mm 

 high, and 480 by 350 mm in area. Rather numerous, massive, 

 irregular, coalesced trunks form the heavy base of the colony, from 

 which spring roughly palmate elements subdivided (sometimes dicho- 

 tomously, sometimes not) into irregular branches. There are fuUy 

 200 of the terminal blunt branchlets 5 to 8 mm in diameter. Some of 

 the branches coalesce above the basal irregular mass of trunks. 

 Another specimen (Monterey Bay) is 160 mm high, about 190 mm 

 broad, and 60 to 80 mm thick. The base of the colony is solid, roughly 

 fan-shaped, the short thick branches arising in several tiers from the 

 margin and subdividing dichotomously. 



The cyclosystems are very numerous, 0.6 to 1 mm in diameter, 

 characteristically funnel- rather than cup-shaped, the margin indented 

 by usually 4 to 8 unequal dactylotomes, which are broader at ends 

 than next to the gastrostome. They incise the sides of gastropore 

 deeply (pi. 58, fig. 36). Margin of cyclosystem is raised slightly 

 above the coenosteal surface as a low abrupt ridge. There is some 

 variation in the size of dactylotomes, but their inequality is very 



