BrTLLETIN 59, UNTTF.n STATKS NATIONAL MUSFUM. 



181 



edge, hut thicker below, also tiiickei- on the lower than on tlir ujipcr ]iurtioii of 

 the corallum. There are about twice as many delicate, frosted, iiuiral ilenticles to 

 the calice as there are septa. 



The septa are i-atlier thicker, usually sliirhtly thickei- than the width of the 

 narrow, but open, interseptal Inculi. The septal margin.s u.sually t)e<,nn an appre- 

 ciable distance below the upper edj^e of the wall; if continued upward, thev are 

 very narrow. Between a pains and the wall there is normally one trabecula. which 

 forms a granule on the septal iuar<^in. The relation of this oruiudi' to the wall is 

 variable, it may be very close, actually adherent, or detached; where the hitter con- 

 dition obtains, the intervening portion of the septal margin is excavated. The 

 granules are not very prominent, they are irregular in size, fro.sted. joined bv a 

 more or less incomplete synapticular ring. There is no definitely developed nuual 

 shelf, but there are rudiments of one. In some instiinces there are two septal 

 trabecidie, and correspondingly two septal granules. The synapticular ring con- 

 necting the septal trabecuhe may fuse with or be separate from the wall. 



The pali are well ileveloped, pointed or truncate, iu)t very tall, those before the 

 lateral pairs larger and more prominent; the fornuila neaily always complete. The 

 palar ring of synapticula is normally complete. 



The columella is a thin and relatively wide lamella, lising from the bottom of a 

 pit, bounded by the perpendicular inner edges of the pali. and joined l)y latiial con- 

 nections to the inner terminations of the septa. 



The skcletiil surfaces are covered with closely set, rough graiudations. 



Locality. — Reef at Kaunakakai, Molokai. Alhuiross. litui'. 4 specimens. 



Type.—^&t. No. L'lL'TT. U.S.N.M. 



RemarJi-K. — This forma intergrades in calicidar chai-acters with both forma 

 conjungens and forma (inijiixtixcjiln. 



PORITES COMPRESSA forma PILOSA, new. 

 I'late I.XXIl, lij^s. 2, 2o. 



Corallum ramose, brandies ascending, compressed; coalescing extensivelv, leav- 

 ing short, obtusel^v rounded or truncated, protuberant ends. 



MEASUREMENTS. 



"The free portiim. 



These two specimens are portions of coral la. 



Calices polygonal, with delinite Itoundaries. with diameters between 1.5 ami 1.75 

 mm.; the I'alicidai- cavity shallow, or even sii|)erticial. 



