Oregon Department of Agriculture guides
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Slug or Snail?
Slugs have:
no visible shell or a small shell that cannot contain their body.
Continue to slugs
Snails have:
a coiled shell that can contain most or all of their body.
Continue to snails
Slugs
Parts of a slug
Common slug identification key
With visible shell
Without visible shell
1. Pneumostome in anterior half of mantle
2. Pneumostome in middle or posterior half of mantle.
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