MONOGRAPH OF THE EXISTING CBINOIDS. 727 



Rathbun said that the color varies greatly; nearly half the specimens have a tin<je 

 of green, varying to bluish, this color being sometimes very light, at others dark; 

 many specimens were very light purplish, purplish wliite or yellowish white; light 

 shades of brown and gray also occurred, and several varieties of coloring may be 

 found on the same specimen; the arm bases and calyx are generally darker than 

 the rest of the body, being often of a dark olive color. He remarked that Endoxo- 

 crlnus parrce retains more of its natural color in alcohol than Isocnnus decorus. 

 Professor Nutting found none that were either white or j^ellow, all being of some 

 shade of light brown, usually with a purplish or violet tinge, and sometimes ap- 

 proaching a flesh color. 



Family PHRYNOCRINID.^. 



Phrynocrinus midus. — Dull greenish yellow. 



Family BOURGUETICRINID^. 



Bathycrinus pacificus. — Ver}' light yellow. 



Ilycnnus carpenteri. — Beautiful straw yellow throughout, the root being a 

 little darker than the rest of the column. The crown is, perhaps, a little paler ; but 

 when the sexual organs contain the sexual products the pinnules are much darker. 



Rhizocnnus lofotensls. — {a) Clear grayish brown. 



{!)) Clear grayish yellow. 



[c) Whitish gray. 



Democrinus rnwsomi. — (a) Whitish. 



{b) Column grayish j'ellow; arm tips and pinnules lemon yellow. 



A browni-sh species of Rhizocrimis or Byfhorrlmn^ has been mentioned bv 

 Professor Nutting, and Mr. Alexander Agassiz saj-s that '■'■Rhizocriints lofoten^is^ 

 (probably a species of Bythocnnus) when alive is brownish chestnut, varying from 

 that to a dirty white. 



Family APIOCRINID^. 



Proisocrinus rubert'ivius. — Brilliant uniform scarlet. 



Family PLICATOCRINID^. 



Calamocrinus diornedce. — Brilliant lemon yellow, with a greenish tinge on the 

 sides of the arms and along the anibulacral grooves. 



PtUocrinus pinnatus. — Bright yellow. 



Ptilocrinus antarcticus. — Bright j'ellow. 



Gephyrocrinus grimaldii. — Yellow. 



Thalassocrinus pontifcr. — Pale sulphur yellow, the lower end of the column 

 becoming brownish. 



SUMMARY. 



Among the comatulids we have 213 records of the living colors, of which the 

 present author is responsible, directly and indirectly, for 109. These records refer 

 to 130 species, and of these the author has handled living specimens of 49. 

 142140— 21— Bull. 82 48 



