PLATE 26. 
1-31. Echinonéus cyclostomus LESKE. 
Spines. 
1.— Spine, 3.10 mm. long, 
2.— Spine, 1.51 mm. long, § 
— Spine, 1.51 mm. long, detail of Figure 2, edge showing serration. 
4.— Spine, 2.30 mm. long, from right posterior interambulacrum, midway between actinostome and 
ambitus. 
5.— Spine, 2.30 mm. long, detail of Figure 4, top view, larger magnification. 
oa cea oe ae ee from left anterior interambulacrum at ambitus. 
8.— Spine, _ long, from odd posterior interambulacrum, near anal system. 
9.— Spine, _ long, detail of Figure 8, top view, larger magnification. 
10.— Spine, 0.60 mm. long, from left anterior interambulacrum at ambitus. 
11.— Spine, 0.60 mm. long, same as Figure 10, larger magnification, showing serrations. 
12.— Spine, 2.18 mm. long, base and section of a spine. 
13.— Spine, 2.18 mm. long, top view of Figure 12. 
14.— Spine, 1 mm. long, from anal system. 
15.— Spine, 1 mm. long, same as Figure 14, larger magnification, showing serrations. 
16.— Stalk, 0.34 mm. long, of a globiferous pedicellaria, from right anterior interambulacrum, near 
apical system. 
17.— Stalk, 0.34 mm. long, same as Figure 16, larger magnification. 
18.— Stalk, 0.44 mm. long, of an ophicephalous pedicellaria, from right anterior interambulacrum, 
midway between ambitus and apical system. 
19.— Stalk, 0.44 mm. long, same as Figure 18, larger magification. . 
from left anterior interambulacrum, near actinostome. 
w 
1-19.— Lord Howe Island from a dry specimen, with spines measuring 34 mm. long. 
Except for details the enlargement is the same. ‘i 
20.— Spine, 1.32 mm. long, from right posterior ambulacrum, near actinostome. 
21.— Spine, 1.32 mm. long, same as Figure 20, larger magnification. 
22.— Spine, 1.90 mm. long, from left posterior ambulacrum, near anal system. 
23.— Spine, 1.90 mm. long, same as Figure 22, section of base through milled collar. 
24.— Spine, 0.50 mm. long, from right anterior interambulacrum, midway between actinostome and 
ambitus. 
25.— Spine, 0.50 mm. long, same as Figure 24, larger magnification. 
26.— Spine, 0.44 mm. long, detail of an end, from right anterior interambulacrum near actinostome. 
27.— Spine, 1 mm. long, from right anterior interambulacrum at ambitus. ; 
28.— Spine, 0.72 mm. long, from right anterior interambulacrum, near apical system. 
29.— Spine, 0.35 mm. long, from left anterior interambulacrum, near apical system. 
30.— Stalk, 0.63 mm. long, of an ophicephalous pedicellaria, from right anterior interambulacrum, near 
actinostome. 
31.— Stalk, 0.63 mm. long, same as Figure 30, larger magnification. - 
Figures 20-31, Makemo Island, Paumotu Islands, are from an alcoholic specimen, with spines 
measuring 18 mm. long. 
Enlarged slightly more than those from Lord Howe Island. 
