718 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



moderately high near the center and become gradually shorter outward, 

 connate to their tips, which form a single acuminate spine at the point 

 of junction; the apertures about 0.10 by 0.08 mm. 



The central area is concave in younger stages to nearly flat in older 

 sub-colonies, elliptical in outline ; the cancelli about as large as the aper- 

 tures of the tubules, partially closed by an "iris-like" diaphragm with a 

 large central pore. The interradial and intercolonial cancelli do not 

 differ from those of the central area, except that they vary more in size 

 and the amount of closure. 



The ovicells are interradial and covered by a layer of secondary can- 

 celli, and the ooeciostome is short, thin-walled, round, without a flaring 

 border, barely elevated above the level of the cancelli, and measures 

 0.08 mm in diameter. 



Young marginal sub-colonies develop near the border along with the 

 proliferation of the lamina after 3 or 4 rows of cancelli are formed. 

 There are several such incomplete discs at the edge of the zoarium, with 

 the first few radii outlined on the side toward the center of the zoarium. 



This species belongs to the "Radiopora" group in which the sub- 

 colonies are distinct (the discs not confluent) and their discs similar to 

 that of the primary colony (see Waters, 1918, plate 4, figs. 1-4), but 

 appears to be diflferent from any of the recent "Radiopora" species de- 

 scribed, Discopora meandrina Peach, Radiopora irregularis J. Y. John- 

 son, Discoporella pristis MacGillivray, and Lichenopora bullata and 

 L. magnifica MacGillivray. 



Type, AHF no. 128. 



Type locality, Hancock Station 1889-49, Cortez Bank, west of the 

 United States-Mexican boundary, 32°27'05''N, 119°08'04"W, at 15 

 to 20 fms. 



? Disporella octoradiata (Waters), 1904 

 Plate 75, fig. 6 



Lichenopora octoradiata Waters, 1904:97. 

 Disporella (?) octoradiata, Borg, 1944:257. 



Waters' description is as follows: "The zoarium is very solid and 

 much raised, with the base narrower than the disk. There are a number 

 of biserial rays, formed by a few zooecia, and in a well developed colony 

 there are 8 main rays, with indications of the commencement of another 

 series. The rays do not extend to the border of the zoarium, nor are 

 the zooecia around the border of the disk elevated, while in the center 

 of the zoarium the openings are round and vary in size." As far as it 

 goes this is as fairly complete a description of our two young specimens 

 as could be wished. The radii are regularly arranged in a short-elliptical 



