BULLETIN 59, UNITED STATES NATIONAL MUSEUM. 183 



more thiui 12, Imt less than 24 in luiiiilxT. Neai- tlic ha>o, tlir wall may lie obscured 

 by the thickened distal ends of the septa: because of these thickened septal ends, at 

 the level of the base of the septal >;ranules, it a]>peai's thick and solid. 



The septa uually are thicker than the intci-scptal iociili; tiic lattei-. however, are 

 as a rule open. Most coniinoidy one septal trabecula eincrges between the palus and 

 wall, occasionally two. The coluinellar, palar. septal, and mural trabecula- are 

 almost jiarallcl in their courses. The septal granule stands a slie;iit distance away 

 from the wall, and is nioderateh' prominent, but doe.s reach the level of the edge of 

 the wall. Both synapticular rings are imi)erfectly developed, especially the outer 

 or the mural; those belonging' to the latter ring are close to the -wall and are 

 fretiuently fused to it. 



The pali are prominent, thick, and coarse; the formula may be complete, but 

 fre(|uently there is none on the ventral directiv(\ 



The columella is a compressed, small or rather stout style. 



The skeletal structures are covered with short, blunt, coarse graiudations. 



Liiciilifi/. — Pukoo, island of Molokai; depth, 3 to 6 feet; received from Dr. 

 W. T. Brigiiam. 



6Wy^>e;.v.— Cat. Nos. 2094.5, 20'.'4(i. 2()!I4T. I'.S.N.M. 



Reviarks. — Forma dommurata intergrades on the one hand with forma jiiloso., 

 on the other with forma gf<inim>(rata. 



The specimen described in the succeeding note was not referred to any forma, 

 because of its intermediate characters. 



Corallum composed of truncated compressed branches or coalescent plates, free 

 for only a small portion of their length. Height of corallum, 4.9 cm.; branches free 

 for 0.9 cm.; width, 0.8-3.1 cm.; thickness, 0.6.5-1.1 cm. The specimen is perfect. 



The calices are shallow, polygonal, detinitely delimited, ranging in diameter from 

 1 to 2 mm., with about 1.5 mm. as an average. 



The wall is distinct, slightly elevated on the upper portion of the coralhiin. with 

 coarse nuiral denticles somewhat more numerous than the septa: on the basal portion 

 it may be obscured. 



In its septal characters and its surface ornamentation this specimen c<iinbines 

 forma jiilaxd with forma (hiiKnininifii: it is preciselj' intermediate. 



PORITES COMPRESSA forma GRANIMURATA. new. 

 Plate LXXIIl, tigs. 2, L'a. 



Corallum composed of branches of small diameter (S by 11 nun.), fi'ee distally 

 for from 12.5 to 17.5 mm., the ends truncate and claxate, coalescing below the 

 summits into plates. Height of larger pieces, 7 cm. 



Calices shallow, definitely delimited, ranging in diameter from 1 to 2. .5 mm., 

 average diameter about 1.;"). 



Wall slightly elevated, usually contiiuious, 15-20 irregularly shaped nuirul 

 denticles to the calice. 



The septaare thick, with intervening narrow l)ut open interseptal loculi. Between 

 the palus of a septum and the wall is one septal tr<ii)ecula terminating superiorly 

 in a septal granule slightly distant from the wall, a shelf running around the inside 

 of the wall between it and the ring of granules. 



