A MONOGRAPH OF THE EXISTING CRINOIDS 149 



Blake station 277; off Barbados (lat. 13° 03' 55" N., long. 59° 38' 25" W.); 194 

 meters; temperature 14.44° C; coral bottom; March 5, 1879 [Hartlaub, 19121 (2 

 M. C. Z., 485). 



Blake station 298; off Barbados (lat. 13° 03' 28" N., long. 59° 37' 40" W.); 220 

 meters; temperature 16.11° C; rock bottom; March 10, 1879 [Hartlaub, 1912].' 



Blake station 294; off Barbados (lat. 13° 14' 18" N., long. 59° 40' 10" W.); 249 

 meters; temperature 12.50° C; hard bottom; March 9, 1879 [Hartlaub, 1912]. 



Hassler; off Sandy Bay, Barbados; 183 meters; December 29-30, 1871 ; for further 

 details see footnote, p. 140. [Pourtalds, 1878; P. H. Carpenter, 1881 ; Hartlaub, 1912] 

 (2, M. C. Z., 493). 



Cable repau- ship Investigator; off St. Lucia (lat. 13° 52' N., long. 61° 07' W.); 

 508 meters; Capt. E. Cole (1, M. C. Z., 193). 



Blake station 269; off St. Vincent (lat. 13° 07' 55" N., long. 61° 05' 36" W.); 

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

 1881; Hartlaub, 1912] (4, M. C. Z., 187, 479). 



Blake station 232; off St. Vincent (lat. 13° 06' 45" N., long. 61° 06' 55" W.); 

 160 meters; temperature 16.67° C; coral bottom; February 21, 1879 [Hartlaub, 

 1912] (3, M. C. Z., 188, 482). 



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 [Hartlaub, 1912]. 



Blake station 262; off Grenada (lat. 12° 01' 45" N., long. 61° 47' 25" W.); 

 168 meters; temperature 16.67° C; fine sand; March 1, 1879 [Hartlaub, 1912]. 



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] (3, 

 M. C. Z., 490). 



Geographical range. — From the Bahamas and Cuba southward to Grenada. 



Bathymetrical range. — From 122 to 508 meters. The average of 14 records is 

 274 meters. 



Thermal range.— From 8.33° to 16.67° C. The average of 8 records is 14.09° C. 



Remarks. — Pourtales in 1878 first described this form from a specimen which 

 had been dredged by the Hassler in 183 meters off Barbados. 



In the original description Pourtales especially mentions that the distal edge of 

 the brachials "is raised in the shape of a serrated scale on the side nearest the pinnule, 

 particularly about the middle of the arm." He also states that "a membranous 

 expansion borders the arms, embracing three or four joints of the pinnules and 

 fringing the latter also in proportion. This expansion is greatest toward the end of 

 the arm." 



In 1881 Carpenter, in his preliminary report upon the Blake comatulids, imited 

 alata and pulchella under the latter name. He preferred this to alata, since alata he 

 supposed to refer to the lateral extension of the ventral perisome described by 

 Pourtales which he rightly considered a very variable character well marked in some 

 individuals but barely traceable in others. 



He gives a detailed description of "Actinometra pulchella," which includes both 

 the pulchella and alata types, and refers especially to the latter in a footnote. 



In his report upon the Blake comatuhds, which was pubhshed in 1912, Hartlaub 

 rightly considered that Pourtalds' name alata referred to the processes developed upon 



