14 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.43. 



LITHOPHYTUM ROSEUM, new species. 

 Plate 1, figs. 3, 3a; plate 17, fig. 3. 



Colony a compact lobulated mass 3.8 cm. in height and with a 

 greater diameter of 3.2 cm. and a lesser diameter of 1.9 cm. The 

 main stem is very short, in the form of a flattened disk. The branches 

 bear closely approximated nodules, oval vv^hen viewed from above, 

 and with a larger cUameter of 5 mm. on the average; but they afe 

 also smaller in many cases. The branches are very short. 



The individual calyces are entirely included, looking like those of 

 Pocillopora. Their margins form a very sUght elevated ring. They 

 are about 1 mm. broad, and the retracted polyps fill them level with 

 the margin. The polyp walls bear eight longitudinal bands of pink 

 spicules vertically arranged, not en chevron. The tentacles are short, 

 broad, fringed, and apparently without spicules. The sides and under 

 parts of the nodules bear warty protuberances which may be zooids, 

 but are more likely young polyps. 



Spicules: These are minute spindles, usually slender and with regu- 

 larly disposed verrucas. Sometimes they are stouter, tending to an 

 oval shape, and, rarely, irregularly branched. Those in the polyp 

 walls are pink, the others white. 



Color: The stem is palhd, the retracted polyps and margins of the 

 calyces are pinkish. The general ccenenchyma is whitish. 



There are well developed ova in the bottoms of the calyx cavities. 



Locality.— Stsiiion 5026; lat. 48° 36' 10" N.; long. 145° 17' 30" E.; 

 119 fathoms. 



Type-specimen.— Cat. No. 30020, U.S.N.M. 



Genus DENDRONEPHTHYA Kukenthal. 



Nephthyidse in which the polyps are usually in bundles, and in 

 which the individual polyp is supported by several large spindles 

 constituting the "Stutzbundeln" of German writers. 



DENDRONEPHTHYA SPLENDENS (Kukenthal). 



Spongodes splendens Kukenthal, Alcyonaceen von Ternate, 1896, p. 104. 



Colony a beautifully symmetrical dendroid form 21.5 cm. in height. 

 The sterile stem is 10 cm. high, wrinkled longitudinally throughout 

 and with fine transverse rugosities on its distal end. The stem 

 greatly resembles that of Ptilosarcus, and looks as if it were inflatable. 

 The main stem continues throughout the colony to near the distal 

 end, where it forks. The branches are very numerous, short, and tend 

 to an arrangement in whorls. They are sometimes strictly cylin- 

 drical and at others much flattened. The younger branches seem 

 to be the round ones, the older flattened. The branches vary greatly 

 in the extent of ramification, some of the larger ones being minia- 



