528 PROCEEDINGS OF THE NATIONAL MUSEUM VOL.84 



The coenosteum is scarcely thicker than depth of gastropore. Its 

 surface is occupied by numerous, rather uniform, thimble-shaped 

 papillae, a little broader than a dactylotome, rising about as high as 

 the rim around cyclosystem. General surface spiculose or finely 

 granulated. Under high magnification it appears very irregularly 

 fenestrated and spongy, a characteristic also of the rim and interior 

 walls of cyclosystems. 



No ampullae can be detected. 



Color "livid madder pink or brown" (Dall). The colony was 

 badly in need of cleaning owing to dried organic material. After 

 clearing with weak sodium hypochlorite the color changed to purphsh 

 vinaceous when wet; or pale laelia pink when dry (Ridgway's nomen- 

 clature). 



Type.— v. S.N. U. no. 6852. 



Type locality. — Coal Harbor, Unga, Shumagin Islands, Alaska. 



Specimen examined. — The type. 



Remarks.— The detailed figures of this species (pi. 54, figs. 4, 4a) 

 have been placed next to those of petrograpta for convenience of 

 comparison. Yet it seems to me that papillosa is possibly an offshoot 

 of calijornica stock, while petrograpta is more likely related to porphyra, 



ALLOPORA PORPHYRA (Fiaher) 



Plate 59, Figures 1, 2; Plate 60; Plate 61, Figures 1, la; Plate 70, Figures 



2, 2a 



Stylantheca porphyra Fisher, Ann. Mag. Nat. Hist., ser. 10, vol. 8, p. 395, pi. 

 16, figs. 5, 5a-56; pi. 17, figs. 6, 6a-6c, 1931. 



Diagnosis.— Colony encrusting, thin, reddish purple, with typically 

 large circular or elliptical cyclosystems, having usually 8 to 12 sub- 

 equal, short dactylotomes; gastropore relatively very wide and open 

 with from 1 to 12 (ordinarily 3 to 7) robust gastrostyles, variable in 

 size ; coenosteum firm with numerous small, papilliform prominences, 

 occasionally arranged in subparallel rows, or coalesced into interrupted 

 meandering ridges. 



Description. — The cyclosystems, which are subcircular to elliptical 

 and relatively large, have a low, raised border indented by usually 8 

 to 10 dactylotomes, whose radial extent is equal to from one-fourth 

 to one-third the diameter of the gastropore alone ; rounded bottom of 

 gastropore a little broader than the top. On the side of the cup the 

 dactylotomes extend about 0.6 to 0.7 the distance to bottom. Diam- 

 eter of cyclosystems 1 to 2 mm, usually 1.25 to 1.5 mm; depth about 

 equal to extreme wddth. Occasionally two cups coalesce, but the 

 ordinary elliptical cups are not formed by a union of two. The most 

 characteristic feature of this species is the presence of 3 to 7 gastrostyles 

 in both circular and elhptical cyclosystems, 3 or 4 being a common 



