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1 Department of Zoology, University of Washington, Seattle, Washington 98105
1. The external anatomy of 4 zoeal stages and a megalopa of Pagurus annulipes and P. pollicaris is described from laboratory-reared specimens.
2. Keys to the shallow-water hermit crab larvae of the Woods Hole, Massachusetts region are given, based on larval pigmentation and on external anatomy.
3. Comparison with Thompson's (1903) figures shows that he illustrated P. annulipes, not P. longicarpus.
4. Comparisons with other larvae of the genus Pagurus are made in context of an examination of currently proposed groups within the genus. The validity and usefulness of these groups is seriously questioned.
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