ALASKAN HYDROCORALLISLE. 113 



looking much the same. Soft parts unknown. Crust growing several 

 inches in diameter, and rarely more than three-eighths of an inch 

 in thickness, generally found on dead shells of Modiola or pieces of 

 nullipore from deep water. Habitat: thrown up on beach of 

 Chika Islands, Akutan Pass, Aleutian Islands, near Unalashka 

 five specimens collected May, 1872, by W. H. Dall. Catalogue 

 number, U. S. Nat. Museum, 4193. 



Allopora Moseleyi, n. s. 



Ccenosteum thick, nodulous or indistinctly branched, rosy pink, 

 solid, with an irregular vesicular surface with sporadically dis 

 tributed protuberant calyces, consisting of subcircular gastropores 

 deeply vertically grooved near their margins by seven to twelve 

 dactylopores whose cavities are continuous with the cavity of the 

 gastropore. Ampullae not observed. Diameter of the dactylo- 

 poric circle about i^*. ; of the gastropore proper o. 75 mm . Gas 

 tropores rather deeply (o.5o-o.75 mm .) cup-shaped, with the inner 

 surface spiculose ; style as in the preceding ; margin of the pore 

 deeply indented by the dactylopores, which are usually nine in 

 number, but appear to be normally twelve ; the whole calyx pro 

 jecting, nipple-like, about o.5-o.6 mm . from the general surface; re 

 calling, in form, a small contracted Zoanthus. A spiculose lamellar 

 style appears in the depth of each dactyloporic groove on careful 

 search. The grooves appear to remain always open. 



General surface impervious, covered between the raised calyces 

 by small irregular sparse vesicular projections of the ccenosteum, 

 otherwise in appearance and compactness much as in the previously 

 mentioned form. Soft parts unknown. Habitat : Kyska Harbor, 

 Kyska Island, in the western Aleutians, one specimen on the beach 

 growing in a cavity between the layers of a mass of nullipore, col 

 lected July, 1873, by W. H. Dall. Museum number, 6851. 



Allopora papillosa, n. s. 



Ccenosteum very thin, encrusting, livid madder-pink or brown, 

 with a regularly papillose surface, with close set sporadic calyces 



