BUI-T.ETIN 59, UNITED STATES NATIONAL MUSEUM. 157 



those of the third cycle usually unite with tho.-f of the secoml near the columella, but those of the 

 first cycle usually remain independent. 



Columella deep-seated, always present, but variable in size, spongy and crisp. 



Diameter of calicles about 4 mm. 



Neither a lengthy discussion nor a furthei- doscription of this species is necessary. 



The Alhatroftft materiiil consists of a niimhoi' of l)roki'n hranchcs, some of which are 

 typical, but others liave the caliculur inari;ins moderately prominent and o-rade into 

 the variety cucuUata, described below. 



Local itij.—K.&\vii Channel, between Molokui and Oahu islands, Station .S893; 

 depth, 220-346 fathoms; bottom, fine white sand, rock; temperature, •iT-' F. 



DENDROPHYLLIA AMPHELIOIDES var. CUCULLATA, new variety. 

 Plate XLVII, lig. :i; Plate XLVIII, tigs. 1, 2, 3, 4. 



This variety is .separated from the typical form of the species by having moder- 

 ately prominent or very prominent calices; the lip on the proximal side is often 

 produced and curved over the calicular orifice, forming a hood. The back of the 

 hood is sometimes carinate. The intergradation between the two varieties is perfect. 



Localities. — 



South coast of Molokai Island: 



Station 3S27; depth, 319-371 fathoms; bottom, light gray brown mud; tempera- 

 ture, 42.1^ F.; 1 fine branch (Plate XLVU, fig. 3, Plate XLVIII, fig. 4). 



South coast of Oahu Island: 



Station 3922; depth, 281-369 fathoms; bottom, light graj- sand, broken shells, 

 corals, rock; temperature 44.5° F. ; several broken pieces (Plate XLVIII, figs. 1, 2). 



Vicinity of Kauai Island: 



Station 3982; depth, 233-240 fathoms; bottom, coarse brown coral sand, shells; 

 temperature, 48.5° F.; 1 broken branch (Plate XLVIII, fig. 3). 



C'oty pes.— C&t. Nos. 20830, 20831, 20832. 



Family ACROPORID.E \errill. 

 Genus ACROPORA Oken trestr. Verrill). 



1801. Madrepora (part) Lam.\rck, Syst. Anim. saus Vert., p. .371 (not of Linnseus, 1758). 



181.5. Acropora Qky.^ , Lehrb. Naturgesch.. p. 66. 



1834. Ueteropora EnRENBERG, Acad. W'issensch. Herlin, Abhandl. for 1832, p. 338 (not of de 



Blainville, 1830). 

 1878. Isoimra (as subgenus) Sti'der, Acad. Wissensch. Berlin, Monatsber., p. 535. 

 1893. Madrepora Brook, The Genus Madrepora, Cat. Madrepor., Brit. Mus. (Nat. Hist.), I. 



1901. Isopora V.\ughan, Geolog. Reichs-Mu.s. Leiden, Samml., 2nd ser., II, p. 68. 



1902. Acropora Verrill, Conn. Acad. Sci., Trans., XI, pp. 164, 208. 



The Madrepora of Lamarck, Dana, Milne Edwards and Haime, and all authors 

 to within a few years was not the Mixhi pom Liiina-ns, lOth ed. Acroporii Oken is. 

 as Verrill has shown, the first available name. 



