226 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



as long as broad, the third to tenth are half again as long as broad, and the terminal 

 segment is short. All the segments are smooth. 



The disk has been thrown off. Sacculi are rather scarce. 



The color is light brown. 



Notes. In one of the two specimens from Mortensen's station 9 as described by 

 Gislen the centrodorsal is conical, 3 mm, broad at the base and 3.5 mm. high. The 

 cirri are arranged as in the type specimen with from 3 to 6 in each radial group. The 

 cirri are XXII, 18, 16 mm. long, those near the dorsal pole with 12 segments and only 

 6 mm. long. The opposing spine is bifurcate. 



The IBr! are five times as broad as long. The IBr 2 (axillaries) have a median 

 carination hi the proximal three-fourths. The IIBr series are 2. 



The 16 arms are all broken in the distal portion. From about the fifth to the 

 twenty-fifth brachials the distal borders are rather strongly everted and collar-shaped. 

 After about the twentieth brachial there is a weak median carination. 



The intersyzygial interval is four or five muscular articulations. 



P! is 4 to 5 mm. long with 15 segments. P 2 is 4.8 to 5.5 mm. long with 14 seg- 

 ments. P 3 is 4.7 mm. long with 10 segments. P s is 4.5 mm, long with 10 segments. 

 The disk is 5 mm. in diameter and is covered with coarse calcareous granules. The 

 anal cone is inflated and wart-shaped, 1.5 mm. high. 



The color is a very bright brown. 



In the other specimen from Mortensen's station 9 the cirri are XXVIII, 16-18, 

 18 mm. long, the apical cirri with 12-14 segments and 9-12 mm. long. The dorsal 

 carination of the segments is well marked. In one case the opposing spine is doubled, 

 thus giving rise to four opposing spines on the penultimate segment. The centro- 

 dorsal is 3.5 mm. broad at the base and 4 mm. high. The radials are visible as flaps 

 in the interradial angles. The IBri are six times as broad as long. All the postradial 

 series are broken off at the synarthry in the IBr series. 



Gisle'n wrote that this specimen had been sacrificed for more detailed study. The 

 cirrus sockets are, as evident from the figure, provided with short and broad incomplete 

 septa, from 10 to 15 in number. The lumen, which is transversely oval, is surrounded 

 by a low areola as in certain Cretaceous comatulids. There are broad interradial areas 

 on the centrodorsal free of cirri. New cirri are appearing on the ventral face of the 

 centrodorsal between this face and the radial ring. The centrodorsal cavity is nearly 

 as large as that of Leptometra. The basals are not visible externally. The free dorsal 

 part of the radials protrudes only in the interradial angles. The radial ring is 4 mm. 

 broad and 2 mm. high. The muscular fossae are high and narrow, excluding the inter- 

 articular fossae from the neighborhood of the lumen. The radial cavity is 0.8 mm. La 

 diameter, comparatively small, and is filled by a porous calcareous plug. This calca- 

 reous plug also fills the cavity of the ring that is formed by the five IBrj. 



Localities. Dr. Th. Mortensen's Pacific Expedition 1914-16, station 9; southern 

 Japan, off Kiu Shiu (lat. 3215' N., long. 12812' E.) ; 162 meters; hard bottom; May 15, 

 1914 [Gisl6n, 1927, 1934]. 



Albatross station 4894; Eastern Sea from 10 to 20 miles southwest of the Goto Is- 

 lands; Ose Saki Light bearing N. 41 E., 5 miles distant (lat. 3233' N., long. 12832'10" 

 E.); 174 meters; green sand, broken shells, and pebbles; August 9, 1906 [A. H. Clark, 

 1907, 1908, 1909, 1912, 1915, 1918] (1, U.S.N.M., 22633). 



