C. L. Edwards 
241 
11. HOLOTHURIA FLORIDANA POURTALES. 
A. Body. 
a. Form. 
The cylindrical body tapers somewhat more posteriorly than anteriorly and is 
flattened in the trivium upon which it generally creeps. At the anterior end the 
mouth is ventral while the anus is terminal posteriorly. As the Holothurid pushes 
itself along over the slimy whitish coralline sand of the bottom, from the low tide 
mark to one, or a few fathoms, in depth, pieces of dead water-weeds, small shells 
and calcareous debris are caught up among the dorsal ambulacral appendages and 
serve as an excellent protective mask. 
b. Size, 
TABLE III. 
1 . Length in cm. 
Alcoholic specimens measured while straightened out on a table and 
placed between two glass plates. 
Adult 
Young 
Number of specimens 
73 
45 
Mean 
17-656+ -390 
6-694± -344 
Standard Deviation 
4-939+ -276 
3-517+ -240 
Coefficient of Variation ... 
29-972 + 1-561 
52-541 + 3-736 
Range of Variation 
9—32-7 
1-7-15-4 
Selenka, 1867, p. 325, gives several individuals 35 cm. long. 
TABLE IV. 
2. Diameter in cm. 
Greatest obtainable taken with a pair of dividers. 
Adult 
Young 
Number of Si^ecimens . . . 
Mean 
Standard Deviation 
Coefficient of Variation ... 
Range of Variation 
73 
5-149+ -120 
1-512+ -084 
29-361 + 1-640 
3-2—8-3 
45 
1-983+ -071 
-816+ -047 
40-614 + 2-878 
-6—3-4 
Biometrika vi 31 
