PuatTeE 18. 
1-18. Podophora atrata Agass. 
1-18. Valves of pedicellarie. 
its 
bo 
17. 
18. 
A valve 0.67 mm. 
A valve 0.65 mm. 
A valve 0.63 mm. 
A valve 0.85 mm. 
A valve 0.88 mm. 
A valve 0.87 mm. 
A valve 0.57 mm. 
A valve 0.50 mm. 
A valve 0.48 mm. 
. A valve 0.15 mm. 
. A valve 0.15 mm. 
. A valve 0.16 mm. 
A valve 0.49 mm. 
A valve 0.47 mm. 
A valve 0.48 mm. 
A valve 0.39 mm. 
A valve 0.24 mm. 
A valve 0.21 mm. 
cluding the spines. 
Tridentate pedicellaria, from the buccal membrane close to the 
teeth, exterior view. 
Tridentate pedicellaria, from the buccal membrane close to the 
teeth, exterior view. 
Tridentate pedicellaria, from the buccal membrane close to the 
teeth, interior view 
Tridentate pedicellaria, from the left anterior ambulacrum, not 
far from actinal system, exterior view. 
Tridentate pedicellaria, from the left anterior ambulacrum, in- 
terior view. 
Tridentate pedicellaria, from the left anterior ambulacrunm, in- 
terior view profile. 
midway between the actinal system and the ambitus, interior 
view. 
Ophicephalous pedicellaria, same pedicellaria as 7, interior view. 
Ophicephalous pedicellaria, same pedicellaria as 7, interior view. 
Triphyllous pedicellaria, from the odd anterior ambulacrum 
among the spheridia, exterior view. 
a pedicellaria from the right anterior ambulacrum 1, 
Triphyllous pedicellaria, same pedicellaria as 10, interior view. 
Triphyllous pedicellaria, same pedicellaria as 10, exterior view, 
profile. 
Tridentate pedicellaria, from the actinal side of the left anterior 
interambulacrum, near the ambitus, exterior view. 
Tridentate pedicellaria, same as 13, interior view. 
Tridentate pedicellaria, same as 13, exterior view, profile. 
Tridentate pedicellaria, from the right anterior ambulacrum, mid- 
way between the ambitus and the abactinal system, interior 
view. 
Globiferous pedicellaria from the odd anterior ambulacrum near 
the ocular plate, interior view. 
Globiferous pedicellaria, same as 17, exterior view, profile. 
The valves are taken from the same specimen, measuring 74 mm. in diameter, in- 
The measurement of the figures gives the natural size ; the enlargement of the valves of 
each pedicellaria is the same, but the enlargement of the different pedicellarie is not 
identical. 
Hawaiian Ids., A. Garrett Coll. 
