132 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



recorded and gave notes on four specimens from station 80 and on one specimen from 

 station 310. 



COLOBOMETRA SUAVIS (A. H. Clark) 



PLATE 16, FIGURES 80, 81; PLATE 17, FIGURE 82 



Cyllometra suavis A. H. CLARK, Smithsonian Misc. Coll., vol. 52, pt. 2, 1908, p. 220 (description ; 

 Albatross station 5137; fragment from station 5145). 



Colobometra suavis A. H. CLARK, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 6 (listed); Vid. 

 Medd. Naturh. Foren. K0benhavn, 1909, p. 177 (compared with C. veprelum) ; Crinoids of the 

 Indian Ocean, 1912, p. 165 (synonymy; locality); Unstalked crinoids of the Siboga-Exped., 

 1918, p. 123 (in key; range); John Murray Exped. 1933-34, Sci. Reports, vol. 4, No. 4, 1936, 

 p. 89 (compared with C. arabica, new species). 



Anledon suavis HARTLAUB, Mem. Mus. Comp. Zool., vol. 27, No. 4, 1912, p. 381 (listed). 



Diagnostic features. -The cirri are composed of 35^10 segments of which the 18-22 

 preceding the penultimate have a single median dorsal spine instead of paired spines ; 

 P, is much less stiff than P 2 and is composed of 21 segments none of which are more 

 than very slightly longer than broad; P 2 to P 7 are approximately equal in length and 

 similar, with only a very slight development of spines on the distal ends of the seg- 

 ments ; the arms are about 100 mm. long. This is a moderately sized species with only 

 a slight development of spines on the distal ends of the pinnule and cirrus segments arid 

 on the distal ends of the brachials. 



' Description. This species agrees in its general structure with C. perspinosa, but 

 it is much more delicate, the IBr series are more elongated, and the arms, cirri, and 

 lower pinnules are more slender. It entirely lacks the prominent spinous overlap of 

 the pinnule and cirrus segments characteristic of C. perspinosa, and the lower pinnules, 

 while stiffened as in C. perspinosa, are much more slender than in that species. The 

 cirri are 25-30 mm. long with 35-40 segments and differ strikingly from those of 

 C. perspinosa in having the dorsal spines in the distal portion single and median in 

 position instead of paired. The arms are about 100 mm. long. 



The color in alcohol is purple, the elements of the IBr series and discoidal lower 

 brachials with a median line of white, the arms, pinnules, and cirri purple with very 

 numerous narrow bands of white. 



Localities. Albatross station 5137; in the vicinity of Jolo (Sulu), Philippines; 

 Jolo Light bearing S. 61 E., 1.3 miles distant (lat. 6 04'*25" N., long. 120 58' 30" E.) ; 

 36 meters; sand and shells; February 14, 1908 [A. H. Clark, 1908, 1909, 1912, 1918; 

 Hartlaub, 1912] (1, U. S. N. M., 25443). 



Albatross station 5145; in the vicinity of Jolo; Jolo Light bearing S. 16 E., 0.85 

 mile distant (lat. 6 04' 30" N., long. 120 59' 30" E.) ; 42 meters; coral sand and shells; 

 February 15, 1908 [A. H. Clark, 1908] (fragments, U. S. N. M.). 



History. This species is as yet known only from a single specimen and fragments 

 of another dredged by the Albatross in the vicinity of Jolo in February 1908 and 

 described by me on December 23 of the same year. 



COLOBOMETRA ARABICA A. H. Clark 



PLATE 30, FIGURE 161 



Colobomelra arabica A. H. CLARK, John Murray Exped. 1933-34, Sci. Reports, vol. 4, No. 4, 1936, 

 p. 87 (listed), p. 89 (Mabahiss station 10; description; comparisons), pp. 100, 104; pi. 1, fig. 2. 



