195 
the basal part to the spiral thread visible only a short distance 
from the distal end. In the cnido-glandular tract there are as a 
rule only a sort of nematocysts which are broader in the basal 
end than in the distal. The basal part of the spiral thread is here 
perspicuous in the greater part of the capsules. 
Cerianthiis filiformis . 
Actinopharj^nx. 
Cnidoglanclular tract, 
• 1) 34—45x5—7 
2) 31-36x4,5-5,5 
3) 16x2—31x4 
22—26x4—5,5 
Cerianthus japonicus . 
. 1) 31—38x4,5-5,5 
2) 31—46x5-6 
3) 19x2,5—31x4 
14-24x4,5—5 
Cerianthus (?) mortensenii .. 
1) 34—38x5—6 
2) (26x4)34-39x5-6 
3) 22—29x2,5—4 
22-26x5 
Pachycerianthus plicatiis .... 
1) 29-38x4—5,5 
2) 29—41x4,5—6 
3) 19—26x2,5—3,5(4) 
24—29x5,5—7 
Isarachnanthiis bandanensis . 
1) 26X3,5—45X6,5 
2) 36X5-60X12 
3) 26—31x3-4 
18—26x5-7 
Isarachnanthiis panamanensis 
1) 30—48x4,5—6,5 
2) 31X5—60X12(14) 
3) 26-36x4—5. 
14—22x6—5 
Arachnanthus bockii ... 
1) 29—41x4,5—5,5 
2) 34x5-65x10—11 
3) 22-26x3-5 
24—31x5—7 
As to the statement of the breadth of the nematocysts I shall 
add that it is approximate. In the cnido-glandular tract of Arach- 
nanthus bockii there were, besides the common nematocysts, also 
opaque, rib like nematocysts, somewhat acuminate in the distal end 
and 22 29 long and 3—5 ,« broad. 
23 -4—1922. 
13 * 
