HYDROCORALS OF THE NORTH PACIFIC — FISHER 513 



The coenosteum, when cleaned, is hard, compact, smooth, lustrous, 

 and without the microscopic pores of Allopora campyleca, although 

 on the branchlets the surface shows irregular low, vermiculate, anas- 

 tomosing ridges, rather pronounced near the cyclosystems. There are 

 scattered, granuUform protuberances, especially on the smaller 

 branches. Small pores about the size of a dactylopore, or smaller, are 

 Andely scattered between the cyclosystems (pi. 53, fig. 1, h, p). 



Color of dried colony grayish white; when cleaned with sodium 

 hypochlorite the coenosteum changes to pinkish white. 



T?/^6.— U.S.N.M. no. 42869. 



Type locality .—'^idiiion 4781, Bering Sea near Agattu Island, lat. 

 52° 14' 30" N., long. 174° 13' E., 482 fathoms, fine gray sand and 

 pebbles; bottom temperature 38.6° F. 



Specimens examined. — The type in several fragments. Also from 

 station 3480, 7 fragments (2 male, from 2 colonies; 5 female, from 

 possibly as many different colonies). 



Remarks. — Through the cooperation of Dr. Broch I have been able 

 to compare the type of moseleyana with the cotype of Allopora scabiosa 

 (Broch). The two species are probably rather closely related but 

 perfectly distinct. In scabiosa the surface of the coenosteum, when 

 carefully cleaned, is not glossy or so close-grained as in inoseleyana, 

 nor are the cyclosystems so protuberant. In scabiosa there is not a 

 sharply differentiated style chamber at the bottom of the gastropore, 

 nor are there spicules protuberant from the wall at about midheight 

 of the gastrostyle as in both forma moseleya,na and forma lepiostyla. 

 The style of scabiosa is much slenderer than in typical mmeleyana but 

 not slenderer than in forma leptostyla (which, however, has a well- 

 developed style cham.ber, if anything more spiculate than that of forma 

 moseleyana). The gastropore of scabiosa is usually shghtly curved, 

 and is more fumid-shaped than cyUndricai. 



In the specimens of scabiosa the female ampullae are convex to the 

 same degree as in moseleyana. The male ampullae are also superficial 

 and convex, but they seem never to carry the tubercle or tubercles 

 which characterize those of moseleyana. 



I have seen a colon}^ of Allopora norvegica (Gunnerus) from Trond- 

 jhemsfjord, Norway, which has a lustrous, hard, whitish coenosteum 

 like that of moseleyana. A young male colony of the latter species 

 greatly resembles this Trondjhemsfjord example in form of colony 

 and distribution of cyclosystems. But in A. norvegica there are 4 to 9, 

 usually 5 to 7, dactjdotomes, which cut much deeper into the side of 

 the gastropore. The gastrostyle is broad, blunt, sometimes sub- 

 hemispherical. The ampullae are imbedded in the branches and do 

 not form conspicuous superficial convexities. 



The architecture of the t,ype of moseleyana resembles that of Allo- 

 pora profunda Moseley from 600 fathoms off the mouth of Rio de 



