58 PROCEEDINaS OF THE NATIONAL MUSEUM. vol. 43. 



long. The base of the polyp is surrounded by a group of much 

 smaller scales, forming a sort of collar in which the polyp is encircled. 



The operculum is strongly developed, as is usual in this genus; but 

 it is rather high, and the individual scales are slender triangles with 

 their distal ends sharply pointed. Those on the abaxial side are longer 

 than the others and overlap them considerably. 



The branches are covered with a complete layer of comparatively 

 small, flattened, irregular scales. 



Color: The basal part of the stem and branches very pale yellow, 

 calyces wliite. 



Localities. —Station 5079; Omai Saki Light, N. 29° E., 24 miles; 

 475-505 fathoms. Station 5080; Omai Saki Light, N. 23.5° E., 28 

 miles; 505 fathoms. Station 5087; Joka Sima Light, S. 84.5° E., 14.8 

 miles; 614 fathoms. 



General distribution. — ^Type-locality, Sagami Sea, 550 fathoms. 

 Okinose Bank, 400 fathoms. Yodomi, Sagami Bay. 



Superficially the calyces of this species greatly resemble those of 

 C. japonica; but they all face downward, and both pairs of scales 

 form an incomplete ring. 



The specimens secured by the U. S. Fisheries steamer Albatross all 

 show the curious membranaceous structure formed of strangely 

 modified spicules which give refuge to a symbiotic annelid. 



CALYPTROPHORA JAPONICA Gray. 



Calyptrophora japonica Gray, Proc. Zool. Soc. London, 1866, p. 25. 



Colony incomplete, 13.1 cm. in height. The branchlets arise from 

 the upper sides only of the branches, regularly spaced, 6 mm. apart 

 and about 11 cm. long. The calyces are in whorls of 4 to 6 on the 

 distal parts of branches and are about 2 mm. long. Both proximal 

 and distal pairs of calyx spicules form a closed ring. The distal ring 

 has four spines projecting downward, and the proximal ring has two 

 spines projecting outward. 



The polyps face the base of the stem or branch. 



Operculum not very prominent, dome-shaped. Each flap is tliin, 

 triangular, with edges turned upward, the ad axial plate being much 

 smaller than the others. 



The branches are covered with flattened scales of irregular shape. 



Color: The axis is almost black proximally, lightening distally. 

 The colony in general is light brown. 



Localities. — Station 4924; Nagada Saki, N. 8° E., 18 miles; 159 

 fathoms. Station 4935; Sata Misaki Light, N. 58° E., 4.5 miles; 

 103 fathoms. 



General distribution. — The type was from Japan. The Challenger 

 found it near the Fiji Islands, 010 fathoms. The Siboga expedition 

 secured it from the Malay Ai'chipelago, 400-1,301 meters. Hawaiian 



