Plate LXXVI 
Sheepswool sponge not over 48 months old, grown on a cement 
disk at Anclote Key from a cutting about the size shown in figure |, 
plate Ixix. Weight, dry and thoroughly cleaned, | 1% ounces. Nine- 
tenths natural size. This illustration shows the closely felted soft 
surface in contact with the disk. The corresponding surface of a 
natural sponge is open, like the interior, and therefore weaker and less 
durable. 
