Scallop. Drawing by Cindy Robbins
Scallop. Drawing by Cindy Robbins

Sea Urchin. Drawing by Cindy Robbins
Sea Urchin. Drawing by Cindy Robbins

Sea Urchin Shell viewed from bottom. Drawing by Cindy Robbins
Sea Urchin Shell viewed from bottom....

Inside of scallop shell. Drawing by Cindy Robbins
Inside of scallop shell. Drawing by Cindy Robbins

Scallop shell. Drawing by Cindy Robbins
Scallop shell. Drawing by Cindy Robbins

Whelks and periwinkle. Drawing by Cindy Robbins
Whelks and periwinkle. Drawing by Cindy Robbins