PuLaTE 29. 
1-17. Colobocentrotus Stimpsoni A. Ag. 
1-17. Valves of pedicellarie. 
wo 
13. 
14. 
15. 
16. 
17. 
A valve 0.41 mm. of an Ophicephalous pedicellaria, exterior view, near the teeth. 
A valve 0.36 mm, ) Ophicephalous pedicellaria, interior view, near the teeth. 
A valve 0.48 mm. $Ophicephalous pedicellaria, exterior view, nearer the actinal system 
than the ambitus, from the odd anterior ambulacrum. 
A valve 0.50 mm. Ophicephalous pedicellaria profile, interior view, nearer the actinal 
system than the ambitus, from the right anterior ambulacrum. 
A valve 0.51 mm. Ophicephalous pedicellaria, interior view. 
A valve 0.51 mm. Ophicephalous pedicellaria, midway between the actinal system 
and the ambitus, from the left anterior ambulacrum. 
A valve 0.88 mm.) Tridentate pedicellaria, exterior view, not far from the actinal 
system, from the left posterior ambulacrum. 
A valve 0.78 mm. | Tridentate pedicellaria, interior view. 
A valve 0.86 mm.) Tridentate pedicellaria, profile, exterior view. 
A valve 0.47mm. Ophicephalous pedicellaria, showing the articulation near the am- 
bitus, from the left anterior interambulacrum. 
. Avalve 0.47mm. Ophicephalous pedicellaria, interior view, nearer the ambitus than 
the actinal system, from the right anterior interambulacrum. 
. A valve 0.47 mm. Ophicephalous pedicellaria, interior view near the ambitus, from 
the right anterior interambulacrum. 
A valve 0.36 mm. Ophicephalous pedicellaria, exterior view midway between the 
ambitus and the abactinal system, from the right anterior inter- 
ambulacrum. 
A valve 0.17 mm. Triphyllous pedicellaria, midway between the actinal system and 
the ambitus, from the left anterior interambulacrum. 
A valve 0.16 mm. Triphyllous pedicellaria, from the same, interior view of a single 
valve. 
A valve 0.34 mm. Ophicephalous pedicellaria, interior view not far from the ocular 
plate, from the left posterior ambulacrum. 
A valve 0.9mm. Triphyllous pedicellaria, exterior view close to the ocular plate, 
of the right posterior ambulacrum. 
The enlargement of the pedicellariew of the actinal system is somewhat greater than that 
of figs. 7-9 which are drawn on a smaller scale. 
All the figures are from a specimen 88 mm. in diameter including the spines. Collected 
by Dr. Wm. Stimpson at the Bonin Ids. 
