The images that are MORE Squirrel than the others break themselves into 3 groups. The first group is numbered 1-30. The second group is numbered 1K to 7K. The final group has no numbers or text on them. Each image is followed by a number and a description. The number that look like this LB2007.1.102578 are the Penobscot Marine Museum numbers.
Below are 4 links that allow you to see the groups:
Images 1-14
Images 15-30
Images 1K-7K
4 Images A-D with no numbers or text