PLATE 23. 
1-17. Echinonéus cyclostomus LESKE. 
Valves of pedicellariae. 
1.— Valve B, 0.12 mm. interior view. Tridentate pedicellaria, from anal system. Test with spines 
measuring 4 mm. long. 
2— Valve B, 0.13 mm. interior view. Tridentate pedicellaria, from right posterior ambulacrum, near 
actinostome. Test with spines measuring 4 mm. long. 
) Ophicephalous pedicellaria, from odd posterior interambula- 
crum, near margin of anal system. Test with spines 
measuring 4 mm. long. 
5.— Valve B, 0.19 mm. interior view. Globiferous pedicellaria, from left posterior interambulacrum, 
at ambitus. Test with spines measuring 4 mm. long. 
— Valve B, 0.20 mm. interior view. Globiferous pedicellaria, from right anterior interambulacrum, 
at ambitus. Test with spines measuring 5 mm. long. 
7—Valve A. 0.22 cterior wiew | Globiferous pedicellaria, from right anterior interambula- 
7. alve A, 0.22 mm. exterior view. a Set i : ; 
nasa U Oe nnn tenioe ea | enti midway between actinostome and ambitus. Test 
with spines measuring 5 mm. long. 
9.— Valve B, 0.28 mm. interior view. Tridentate pedicellaria, from aboral end of anal system. Test 
measuring 11 mm. Jong. 
10.— Valve B, 0.37 mm. interior view. Tridentate pedicellaria, from aboral end of anal system. Test 
measuring 20 mm. long. 
11.— Valve B, 0.43 mm. interior view. Tridentate pedicellaria, from right anterior interambulacrum, 
near actinostome. Test measuring 20 mm. long. 7 
12.— Valve B, 0.47 mm. interior view. Tridentate pedicellaria, from odd posterior interambulacrum, 
near ambitus, actinal side. Test with spines measuring 25 mm. long. 
13.— Valve B, 0.47 mm. interior view. Tridentate pedicellaria, from aboral end of anal system. Test 
with spines measuring 25 mm. long. 
14.— Valve B, 0.49 mm. interior view. Tridentate pedicellaria, from adoral end of anal system. Test 
with spines measuring 26 mm. long. 
15.— Valve B, 0.43 mm. interior view. Tridentate pedicellaria, from left posterior interambulacrum, 
near actinostome. Test measuring 28 mm. long. 
16.— Stalk and head of a triphyllous pedicellaria, 0.29 mm. long, from right anterior interambulacrum, 
near actinostome. Test measuring 11 mm. long. 
17.— Valve of triphyllous pedicellaria, 0.04 mm. exterior view, from left anterior interambulacrum, 
hear actinostome. Test measuring 11 mm. long. 
3.— Valve A, 0.14 mm. exterior view- 
4.— Valve B, 0.13 mm. interior view. 
for) 
Port Antonio, Jamaica. 1909. 
Each order of pedicellaria is magnified almost identically except Figures 1 and 2, which are on a 
larger scale. 
