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                                                                    Exhibit 23.1

                        CONSENT OF INDEPENDENT AUDITORS

    We consent to the reference to our firm under the caption "Experts" and to
the use of our report dated April 14, 2000 in Amendment No. 1 to the
Registration Statement (Form S-1 No. 333-45496) and related Prospectus of
StemCells, Inc. (formerly CytoTherapeutics, Inc.) for the registration of
3,205,486 shares of its common stock.

Providence, Rhode Island
October 18, 2000



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