PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 277 



it is deeply incised in the median line by the considerably larger irregular second 

 brachial. The first syzygial pair (composed of the third and fourth brachials) is 

 wedge-shaped and much longer interiorly than exteriorly. The following brachials 

 are rather short, after the twelfth becoming more triangular and about as long as broad. 

 The proximal brachials as far as the eighth have slight alternating lateral tubercles. 

 The edges of the elements of the IBr series and of the lower brachials are everted, promi- 

 nent, and very spiny. 



Syzygies occur between brachials 3+4, 9 + 10 and 14 + 15, and distally at intervals 

 of 2 muscular articulations. 



PI is 7.5 mm. long, slender, composed of 35 or more short segments of which those 

 in the proximal half are about as long as broad with the corners cut away and those in 

 the distal half become gradually somewhat elongated, the very slender terminal seg- 

 ments being about three times as long as broad. P 2 is 7 mm. long, considerably stouter 

 and less flexible than PI, with about 15 segments of which the first three are about as 

 long as broad and the following become elongated, the sixth being over twice as long as 

 broad and the terminal ones four or five times as long as broad. The following pinnules 

 as far as P 7 are similar; beyond that point the pinnules become longer and more slender 

 with the first two segments slightly enlarged, the first short and the second about as 

 long as broad, and the remainder elongated. 



Color.- The color in alcohol is white with a conspicuous median line of black on 

 the IBr series and the lower portion of the arms beyond which each syzygial pair bears 

 a transverse black band or large black spot. 



Ventrally the disk is black, and the perisome of the arms is yellowish banded with 

 black. 



Localities. Albatross station 2354; off the eastern coast of Yucatan (lat. 

 2059'30" N., long. 8623'45" W.); 237 meters; coral; January 22, 1885 [A. H. Clark, 

 1918] (1, U.S.N.M., 36290). 



Albatross station 2335; off Havana, Cuba (lat. 2310'39" N., long. 8220'21" W.); 

 373 meters; January 19, 1885 [A. H. Clark, 1918] (1, U.S.N.M., 36296). 



Albatross station 2341; off Havana, Cuba (lat. 2311'00" N., long. 8219'06" W.); 

 261 meters; coral; January 19, 1885 [A. H. Clark, 1918] (1, U.S.N.M., 36295). 



Albatross station 2327; off Havana, Cuba (lat. 2311'45" N., long. 8217'54" W.); 

 333 meters; fine brown sand; January 17, 1885 [A. H. Clark, 1918] (1, U.S.N.M., 

 22674). Type locality. 



Bibb station 139P (in bulletin, 1); off Cojima, near Havana, Cuba; 987 meters; 

 March 4, 1869 [Hartlaub, 1912]. 



Albatross; off Havana, Cuba, without further data [A. H. Clark, 1918] (1, U.S.N.M., 

 36294). 



Fish Hawk station 6067; Mayaguez Harbor, Porto Rico; Point del Algarrobo 

 bearing E. % N. (magnetic), 5.75 miles distant; 175-216 meters [H. L. Clark, 1902] 

 (1, U.S.N.M., 21467). 



Albatross station 2138; southeast of the southeastern point of Jamaica (lat. 

 1744'05" N., long. 7539'00" W.); 42 meters; coral and broken shells; February 29, 

 1884 [A. H. Clark, 1918] (fragments, U.S.N.M., 7110). 



Geographical range. From Yucatan to Porto Rico and Jamaica. 



Bathymftrical range. From 42 to 987 meters; but all except 2 of the records are 

 from between 216 (?175) and 373 meters. The average of the 7 records is 328 meters 

 or, omitting the 2 extremes, 266 meters. 



