A MONOGRAPH OF THE EXISTING CRINOIDS 141 



Blake station 231; off St. Vincent (lat. 13° 12' 10" N., long. 61° 17' 18" W.); 

 173 meters; temperature 16.39° C; sand and broken shells; February 20, 1879 [Hart- 

 laub, 1912] (2, M. C. Z., 481). 



Blake stations 231 (above) and 224 (below) (6, M. C. Z., 24). 



Blake station 224; off St. Vincent (lat. 13° 06' 36" N., long. 61° 12' 45" W.); 

 209 meters; temperature 13.89° C; coral bottom; February 18, 1879 [von Graff, 

 1884; Hartlaub, 1912] (2, M. C. Z., 480). 



Blake station 223; off St. Vincent (lat. 13° 08' 24" N., long. 61° 13' 50" W.); 

 267 meters; temperature 13.33° C; fine black sand; February 18, 1879 [von Graff, 

 1883]. 



Blake station 269; off St. Vincent (\&t. 13° 07' 55" N., long. 61° 05' 36" W.); 

 227 meters; temperature 14.17° C; coral bottom; March 3, 1879 [P. H. Carpenter, 

 1881; von Graff, 1883, 1884; Hartlaub, 1912] (27, M. C. Z., 187, 479). 



Blake station 241; off Carriacou (lat. 12° 28' 22" N., long. 61° 32' 18" W.); 

 298 meters; temperature 11.67° C; sand and coral; February 24, 1879 [Hartlaub, 

 1912] (1,M. C. Z., 474). 



Blake station 259; off Grenada (lat. 12° 03' 15" N., long. 61° 46' 25" W.); 291 

 meters; temperature 11.95° C; sand and ooze; February 28, 1879 [Hartlaub, 1912] 

 (5, M. C. Z., 470, 491). 



Blake station 249; off Grenada (lat. 11° 48' 15" N., long. 61° 48' 45" W.); 479 

 meters; temperature 8.33° C; coarse sand; March 1, 1879 [Hartlaub, 1912] (30, 

 U.S.N.M., 22457, 34480; M. C. Z., 27, 185, 406, 490). 



"Probably off Grenada; label lost." (4, M. C. Z., 492.) 



West Indies [Pourtales, 1878] (2, M. C. Z., 494). 



Caribbean Sea; 133-508 (?695) meters [P. H. Carpenter, 1881, 1888]; same, but 

 incorrectly quoted as 128-695 meters [Hartlaub, 1891]. 



No locality (but somewhere in the Caribbean Sea) [Hartlaub, 1912] (1, M. C. Z., 

 489). 



Challenger; St. Paul's rocks; 18-146 meters; August 1873 [P. H. Carpenter, 1888; 

 A. H. Clark, 1913] (1, B. M.). 



Geographical range. — Caribbean Sea, northward to the Yucatan Bank and the 

 Dry Tortugas and southward to St. Paul's rocks. 



Bathymetrical range. — From 91 (?14) to 567 (?695) meters; most abundant be- 

 tween 150 and 400 meters. The average of 57 records is 277 meters. 



Thermal range.— From 8.33° C. to 21.50° C. Of the 29 records 19 are between 

 12° and 18° C, with 6 below and 4 above. The average of the 29 records is 14.61 ° C, 

 or within half a degree of the mean (14.91°) between the 2 e.xtremes. 



Occurrence. — This species is an inhabitant of rough bottoms, especially coral 

 bottoms with their interspaces of coral sands and broken shells and a sprinkling, m 

 the Antilles, of volcanic ash. 



Remarks.— Stalked barnacles of the genus Scalpellum are frequently found on 

 the cirri of this species. In the material examined they occur at Blake stations 

 32Ag., 148, 155-156, 219, 277, 298, 231, 224, and 241. 



These stations range from the Yucatan Bank to Carriacou with depths of 161- 

 298 (averaging 213) meters, and temperatures of 11.67°-20.56° C. (averaging 

 15.28° C). 



