BULLETIN 59, UNITED STATES NATIONAL MUSEUM. 



155 



Coluiiiflla liitluT larj^u, elliptical, spongy, texture loo.se, coniposocl of rmiiirrou.s 

 thiu, twisted, anostoraosing band-like trabeeuUe, which do not ]ii-ojcct upwaiil into 

 the bottom of the calice. 



Locality. — Northwest coast of Oahu island. Station 4114; depth, l.j-1-195 

 fathoms; bottom, coral sand, foraminifcra; temperature, fiO.T"^ F. ; 1 .specimen. 



Type— Cat. No. 20827, U.S.N. :\I. 



DENDROPHYLLIA SERPENTINA, new species, 

 riato XLVI, figs. 2, 2a, 3, 4, 5. 



Corallum long, cornutc, variously < iir\((l and twisted. The initial corallite, 

 which becomes the axial corallite, is attachetl by a more or less expanded Ijase, above 

 which it often grows as a small, irregularly curved tube to a height of 12 mm. or 

 more. The wall of the main corallite is irregularh- constricted from place to place. 



Measurem^ntis. 



<■ Brbl^en. 



The secondary coi-allites are irregularly scattered over the outer surface, their 

 bases from 2 to 2.5 mm. in diameter. They are slender and may grow to a con- 

 siderable height, reproduce a.sexually, and become the axes of new branches, 

 producing an irregularly branched or bush-shaped colony. 



No vestige of epitheca was seen on any specimen. The wall in its upper 

 portion is thin, fragile, and very perforate; lower down it is secondarily thickened 

 and more compact. There are no costse. Near the calice the surface of the wall 

 is verj' rough, with numerous, irregularly distributed, small, spinose granulations, 

 among which are many pores. Farther down the surface is densely gramdate. the 

 granulations .sometimes showing a striate nrraugement. 



Septa in Hve cycles, the last not always complete; the usual dentlrophyllioitl 

 arrangement. The tertiaries are very short, as are also the inner (|uaternai'ics 

 of any system. \Mien the latter are long enough, they pass in front of the ter- 

 tiaries and fuse near the wall to the sides of the outer ((uaternaries. All the septa 

 are rather thin and fragile, the primaries somewhat thicker; the secondaries and 

 outer (juaternaries about ('([ual in thickness, but of these septa the former are usuallv 

 the shorter. Primaries slightly exsert, the .secondaries have corresponding to them 

 a faint tooth on the margin of the calice. Margins of the larger septsi entire or 

 microscopically crenate; those of the higliei- cycles may be jaggedly (l(Mitate. The 

 septal faces possess delicate striie and gianulations. There may be perforations 

 some distance from the wall. 



Calice deep. 



Collumella rather lai'ge, spongy; texture, lax. 



