326 A. E. Verrill—The Bermuda Islands; Coral Reefs. 
spines are the longest ; oral shields broad heart-shaped ; arms long, 
terete, regularly tapered. 
It conceals itself in rock crevices. Ranges through the West 
Indies to Bahia, Brazil. 
Ophiura appressa Say. 
Ophiura appressa Say, Journ. Phil. Acad., v, p. 151, 1825. Lyman, Ill. Cat. 
Mus. Comp. Zool., i, p. 34, 1865. Verrill, op. cit., 1899. 
Ophioderma virescens Liitken, Vid. Meddel., Jan., 1856, p. 9; Add. ad Hist. 
Ophiur., pt. ii, p. 92, pl. i, fig. 4. 
Agrees with the last in having the lower arm-spines longest, but 
the radial shields are covered by the granulations of the disk ; arm- 
spines about nine, short and flat. The color is very variable; usually 
greenish or grayish green, mottled or specked with darker green and 
whitish ; sometimes pale. 
It lives in rock-crevices ; ranges southward to Brazil. 
Ophiura brevicauda (Litk.) Lyman. 
Ophioderma brevicauda Liitken, Vidensk. Meddel., Jan., 1856, p. 8; Addit. 
ad Hist. Ophiur., pt. ii, p. 94, pl. 1, figs. 83-3e, 1859. 
Ophiura brevicauda Lyman, Illust. Catal. Mus. Comp. Zodl., i, p. 16, 1865. 
Verrill, these Trans., x, p. 584, 1900. 
The arm-spines are equal, short, stoutish. Disk coarsely granu- 
lated ; arms short, about 34 times diameter of disk ; lateral oral 
plates granulated. Colors various; often green, red, or brown, 
irregularly mottled. 
Crevices in the reefs ; not common. Florida and West Indies to 
South America. 
Ophiura brevispina Say. Plate xxxivn, fig. 2, b. 
Ophiura brevispina Say, Jour. Phil. Acad. Nat. Sci., v, p. 149, 1825. Lyman, 
Proc. Bost. Soc. Nat. Hist., vii, p. 258, 1860; Ill. Cat. Mus. Comp. Zool., i, 
p. 18. Verrill, Bull. Univ. Iowa, v, p. 4, 1899. 
Ophioderma olivaceum Ayers, Proc. Bost. Soc. Nat. Hist., iv, p. 184, 1852. 
Ophioderma serpens Liitken, Vid. Meddel., Jan., 1856, p. 7; Add. ad Hist. 
Ophiur., pt. ii, p. 96. 
Ophiura olivacea Lyman, Ill. Cat. Mus. Comp. Zool., i, p. 23, 1865. 
This species has 6 to 8 arm-spines, about equal and flattened. 
Radial shields usually covered ; lateral oral shields naked. Color 
variable, usually green or greenish gray, mottled with lighter green 
