HYDROCORALS OF THE KORTH PACIFIC FISHER 539 



The gastropores are very small, 0.13 to 0.18 mm at the orifice and 

 0.5 to 0.7 mm deep. A few reach 0.2 mm in diameter. The gastro- 

 style is slender, very sharp, and in the deepest pores reaches about 

 halfway to the orifice. The furrow of the dactylopore is about 0.1 mm 

 broad, and the entire projecting process is 0.3 to 0.45 mm broad at the 

 end. Along the bottom of the furrow is a cheval-de-frise of delicate 

 spicules, the dactylostyle, which does not reach the distal end of the 

 furrow (pi. 69, fig. 2a). Scattered, very small pores, one-fourth to 

 one-fifth the diameter of the gastropores, probably represent secondary 

 dactylopores and are entirely without projecting lip. 



The female ampullae form bhsterlike, dome-shaped prominences, 

 0.8 to 1.5 mm in diameter, crowded on the front face of the main 

 branches, and to a less extent on the back. In dried specimens they 

 are conspicuous by reason of their lighter color. There are commonly 

 a number of prominences on the surface of the ampullae as indicated 

 in plate 69, figure 2. 



The coenosteum is hard and very solid, but the surface is spongy, 

 intricately fenestrated, and minutely rough in texture, owing to very 

 tiny, crowded, irregular, branched spicules. The surface of the distal 

 branches is of a coarser texture than that of the trunk where the inter- 

 stices are smaller and the spicules more compact. 



Color of dried colony yellowish buff (capucine buff on the lighter 

 parts to apricot buff and zmc orange on the darker; Ridgway's nomen- 

 clature) . 



T?/pe.— U.S.N.M. no. 42875. 



Type locality.— St&tion 3599, Bering Sea, lat. 52°05' N., long. 177° 

 40' E., 55 fathoms, rocky, fine sand, shells. 



Specimens examined. — The type (pi. 66, fig. 1), paratype (pi. 67), 

 and 5 colonies from station 3599. Also from station 4777, 3 col- 

 onies, fragments, and 2 very small colonies on pebble with Allopora 

 verrilli. 



Remarks. — The yellowish color, tiny gastropores and dactylopores, 

 and large female ampullae are trenchant characters that separate this 

 species from pourtalesii, which is light pink. In pourtalesii the gas- 

 tropores are 0.25 to 0.35 mm in diameter and the robust style nearly 

 fills the cavity, whereas in nanneca the pores are about 0.17 mm in 

 diameter with a very slender style. The dactylostyle is relatively 

 smaller than in pourtalesii. 



EKRINOPORA ZAKHYNCHA, new species 



Plate 68; Plate 69^ Figure 1 



Diagnosis. — Colony branching, strongly flabelliform, the branches 

 relatively massive, more or less compressed, a few times dichoto- 

 mously divided; projections large, ordinarily 1 to 2 mm long and 



