130 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



One of the specimens collected by Dr. Th. Mortensen off Jolo has the arms 105 

 mm. long and the cirri XVIII, 35-36, 27 mm. long. P 2 is 12 mm. long with 16 or 17 

 segments. P 3 is 10 mm. long with 13 or 14 segments. P 4 is slightly shorter and more 

 slender than P 3 and is composed of 12 segments. The color in alcohol is lavender 

 with numerous well separated small red brown circular spots, the cirri with spots and 

 occasional narrow bands of darker. In spite of the large size and wholly different 

 coloration, I can not see that this specimen presents any characters differentiating it 

 from C. discolor. 



The other specimen collected by Doctor Mortensen off Jolo has the arms 85 mm. 

 long and the cirri XIX, 30-36. P t is 7 mm. long with 18 segments. P 2 is 11.5 mm. 

 long with 16 segments. P 3 is 11 mm. long with 18 segments. P 4 is 8 mm. long with 

 12 segments. The color is yellow-brown, becoming purplish on the pinnules and 

 cirri, the last narrowly banded with lighter. 



The largest specimen from Siboga station 80 has the cirri XV, 36-39, from 18 to 

 21 mm. long. The cirri are slightly more slender than in the specimens in the type 

 series, with the long proximal segments slightly more elongate. The dorsal pole of 

 the centrodorsal is papillose. P : is 5.5 mm. long with 13 segments. P 2 is 9.5 mm. 

 long with 14 segments. P 3 is 8.5 mm. long with 14 segments, and is similar to P 2 . 

 P 4 is 6.5 mm. long with 11 segments, and is similar to P 3 . P 6 is 7 mm. long. The 

 elongated proximal pinnules are relatively shorter and more recumbent than they are 

 in the type series. 



Of the other specimens from Siboga station 80, one has the arms 40 mm. long, 

 another has the arms 45 mm. long, and the last has the arms only 15 mm. long with 

 the cirri IX, 12, 3 mm. long, resembling the cirri of the species of Prometra in having 

 the segments mostly about as long as broad. On most of the arms P 3 and P 4 have not 

 as yet appeared. 



The specimen from Siboga station 310 has the cirri with 39 and 48 segments 

 (one of each), 25 and 35 mm. long. The longest cirrus segments are slightly longer 

 than broad. PI is 8 mm. long with 19 segments. P 2 is 12.5 mm. long with 18 seg- 

 ments. P 3 is 10.5 mm. long with 14-17 segments. P 4 is 9 mm. long with 15 segments. 

 The lower pinnules are rather less stiffened than usual in this species, and are slightly 

 recurved. The spines on the distal ends of the pinnule segments are shorter and less 

 prominent than is commonly the case. There are no synarthrial tubercles. The 

 size is the same as that of specimens of this species at hand from the Andaman Islands. 



The specimen from the Bay of Amboina has the arms 60 mm. long. 



Localities. Albatross station 5355; North Balabac Strait; Balabac Light bearing 

 S. 61 W., 16.6 miles distant (lat. 808' N., long. 11719'15" E.) ; 80 meters; coral sand; 

 January 5, 1909 [A. H. Clark, 1911] (1, U. S. N. M., 35367). 



Albatross station 5356; North Balabac Strait; Balabac Light bearing S. 64 W., 

 15.5 miles distant (lat. 806'40" N., long. 11718'45" E.) ; 106 meters; sand and shells; 

 January 5, 1909 [A.^H. Clark, 1911] (2, U. S. N. M., 35316, 35323). 



Albatross station 5145; in the vicinity of Jolo (Sulu) ; Jolo Light bearing S. 16 E., 

 0.85 mile distant (lat. 604'30" N., long. 12059'30" E.); 42 meters; coral sand and 

 shells; February 15, 1908 (1, U. S. N. M., 35321). 



Dr. Th. Mortensen's Pacific expedition, 1914-1916; off Jolo, Philippines; about 

 36-55 meters; sand and coral; March 19, 1914 (2). 



