154 KliCKNT MAUKKl'.iKAKlA oK TIIK HAWAIIAN ISLANDS AND LAYSAN. 

 Genus DEN DROPH YLLI A de Blainville. 

 DENDROPHYLLIA OAHENSIS. new species. 



I'latv XI, VI. i\'^. 1. 1", I''- 



Conilliiiii .■loiii^^atc. worm-like, in-oj>-iil:uly coiistrictod from place to place, lower 

 eii.l broken oil'. Cro.ss section cin-iilar or broadly elliptical. Length of specimen, 

 37 mm.; greater diameter of lower end, 7 mm., lesser, ti mm.; greater diameter in 

 most cons'tricted portion, .5..") mm., les.ser, ."> mm.; greater diameter of calice, 8 mm., 

 lesser, 7 mm. On tiie sides are iricuularly distributed lateral buds. The Hgures 

 sliow their distribution on tiie surface. At tirst they were thought to be attached 

 young; a vertical section, how(>ver, through one of tiiem showed that the wall of the 

 axial corallite was not continuous beneath the young corallite, but that the interseptal 

 loculi of the older and younger corallitcs were in communication. These young 

 corallites are all comi)arativeiy small, the largest has a greater diameter of -t mm.; 

 the smallest, 2..") mm. There is an attached very young coral, with six primary 

 septa, the second cycle not complete, which uieasures only 1 mm. in diameter. This 

 individual most probably had settled on the specimen, and does not belong to the 

 coloii}^. 



There are disconnected, encircling bands of epitheca to within 9 mm. of the 

 calice of the axial corallite. Several young corallites occur above the upper limit of 

 the epitheca. There is also epitheca around the bases of all the young corallites 

 except one. The wall is spongy and moderately thick. Costre distinct veiy nearly 

 the whole length; sometimes they are resolved into mere granulations, and some- 

 times are obscured by the epitheca. Where (dearly seen, which is usually the case, 

 they are low, rather wide, Hattened above, eijual, granulate, and perforate. The 

 granulations rather tall, sometimes in two rows, but usually irregularly distributed. 

 Intercostal furrows shallow and narrow, perforate. 



Septa of the calice of the axial corallite in four complete cycles. All septa thin 

 and distant, slightly thicker near their inner ends. Those of the first and second 

 cycles and the outer members of the fourth in each sy.stem nearly equal in thickness 

 and length; those of the second may be a little shorter. The .shortest and thinnest 

 are the septa of the third cycle. The arrangement for each .system is: The members 

 of the first and second cj'cles extend directly to the columella and fuse to it; the 

 septa of the second are rather often a little shorter than those of the first. The two 

 outermost members of the fourth c\^cle bend awaj' from the primaries and toward 

 the included sec-ondary, I)ut do not fuse to it, extending to the columella. The 

 quaternaries standing on each side of the included secondary bend outward away 

 from it, extend beyond the ends of the tertiaries, and their inner ends approach 

 very closely the outer quaternaries. The tertiaries extend about one-half the 

 di.stance from the wall to the columella. The inner margins of all the septa are 

 free above the l)ottom of the calice, but at a lower level, as the broken lower end 

 of the specimen shows, they fuse into groups according to the scheme above 

 outlined. None of the septa are exsert. Their inner ends usually strongly 

 undulated, the .septal faces show small obliquely a.scending undulations or stria? 

 with granulations along them. Apparently there are only peripheral perforations. 



Calice shallow. 



