594 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxiv. 



The type was secured by the Challenger off Ascension Island, 425 

 fathoms. 



The Sihoga expedition secured the species from Ternate and south 

 of Timor at depths of 765 to 1,994 meters. 



METALLOGORGIA SQUARROSA (Wright and Studer). 



Plate LI, fig. 4. 



Dasygorgia squarrosa Weight and Studer, Report ou the Alcyonaria col- 

 lected by H. M. S. Challenger during the years 1873-1876, 1889, p. 14. 



A number of colonies which agree almost exactly Avith the original 

 description of this species were collected during the Hawaiian cruise. 

 The mode of growth is the characteristic one for this genus, to which 

 I therefore refer the species. 



Distribution.— South coast of Molokai: Station 3828, 281-319 

 fathoms (Cat. No. 25335, U.S.N.M.). 



Off Kauai: Station 3992, 528 fathoms (Cat. No. 25349, U.S.N.M.) ; 

 Station 3997, 418-429 fathoms (Cat. No. 25350, U.S.N.M.) ; Station 

 4003, 406-751 fathoms (Cat. No. 25336, U.S.N.M.) ; Station 4016, 

 305-318 fathoms. 



Between Molokai and Oahu: Station 4107, 350-355 fathoms. 



The type was secured by the Challenger south of the Philippine 

 Islands, depth 500 fathoms. 



Genus IRIDOGORGIA Verrill. 



Axis growing in the form of an upright spiral. Branches simple, 

 long, slender, arranged on one side of the heliciform stem : their bases 

 therefore being inserted in a helix. 



IRIDOGORGIA BELLA, new species. 

 Plate XLVI, fig. 4 ; plate LI, fig. 1. 



The incomplete stem is 325 mm. in actual length, but coiled in 

 such a close helix that the actual height of the colony is only 93 mm. 

 Stem thick and wire-like in structure, very different from the pre- 

 ceding species, bearing a series of closely approximated simple 

 branches on one side, the outer. Branches 4 mm. apart, equally 

 spaced, gracefully curved, about 112 mm, in length. They were 

 almost all stripped from the stem, but apparently they all belonged 

 to the same specimen ; only five of them remained normally attached. 



Polyps uniserial, 7 mm. apart, each arising from a long swelling 

 which embraces the branch, cylindrical, inclined toward the distal 

 end of the branch, proximal end smaller than the distal, about 2^ 

 mm. high. The tentacles are matted together over the tops of the 



