MONOGRAPH OF THE EXISTING CRINOIDS. 715 



Heterotnetra crenulata. — (a) Striped dark violet brown and yellow. 



{b) Red and violet. 



(c) Ked brown and white in cross stripes, the disk with scattered triangular 

 white spots between the ambulacral grooves. 



{d) Red. 



Heterometra afjinis. — Purplisli black and white in alternating bands about a 

 quarter of an inch wide. 



Heterometra savignii. — {a) Purple and white. 



{h) Brown and white. 



(c) Whitish, with a violet tinge, and with patches of darker color and 

 of yellow. 



Heterometra hengalen^is. — Black. 



Amphimetra discoidea. — {a) Yellow brown, the perisome of the pinnules 

 yellow. 



{h) White, the ambulacral grooves and the cirri violet. 



HoTnalometra denticulata. — Bright yellow and lavender in alternating bands 

 about three-sixteenths of an inch wide. 



Family STEPHANOMETRID.^. 



Stefh-anometra echinus. — (a) Dark purple. 



[{b) Orange yellow with a few areas of very dark chocolate wine, becoming 

 lighter on the division series and very light on the arm tips. 



(c) Burnt orange with the disk slightly yellowish; there are numerous small 

 spots of dark wine red over the whole surface, becoming larger, darker, and more 

 numerous on the ventral surface of certain arms, where they give the appearance 

 of very dark chocolate. 



(d) Arms dorsally alternating silver and bright red, ventrally silver and dark 

 wine red; pinnules in general corresponding to the color of the arms at the point 

 of origin; enlarged pro.ximal pinnules and the tips of the others orange; centro- 

 dorsal silver, surrounded by rings of light red brown ; disk light pink, with small 

 spots of orange; cirri silver basally. with occasional areas of light red brown, and 

 silver tips. 



(e) Maroon, crimson, light cream color, and liglit chestnut ; disk white, orange, 

 and pink ; centrodorsal cream color with a maroon margin ; cirri white and orange. 



(f) Wine red, the ends of the arms and regenerating arms bright red, almost 

 crimson, the whole surface with fine silver markings.] 



[Stephanometra oxyacantha. — (a) Proximal third of the arms silver with 

 blackish brown lines at the articulations, the arms then becoming dorsally blackish 

 brown with transverse lines of silver and ventrally blackish brown; enlarged oral 

 pinnules silver, with a blackish brown stripe dorsally; centrodorsal very dark red 

 with a median and five marginal white spots; cirri very dark red with silver tips; 

 disk blackish brown. 



(5) Arms chestnut, maroon, white, and chocolate, with transverse lines at the 

 edges of the brachials; enlarged proximal pinnules with a wash of purple ven- 



