Via Facsimile and U.S. Mail Mail Stop 6010 October 12, 2005 Mr. Rodney K.B. Young Chief Financial Officer StemCells, Inc. 3155 Porter Drive Palo Alto, CA 94304 Re: StemCells, Inc. Form 10-K for Fiscal Year Ended December 31, 2004 Filed March 15, 2005 File No. 000-19871 Dear Mr. Young, We have completed our review of your Form 10-K and related filings and have no further comments at this time. Sincerely, Joel Parker Accounting Branch Chief