AMOSKEAG BANK <AMKG> TO SEEK REHEARING Amoskeag Bank Shares Inc and <Portsmouth Savings Bank> said they will file motions for a rehearing with the New Hampshire Supreme Court of its March 30 ruling that overturned state regulatory approval of Amoskeag's acquisition Portsmouth. "The ramifications of this decision, we believe, go well beyond the affiliation of Amoskeag and Portsmouth Savings Bank," said Amoskeag chairman William S. Bushnell. The transaction was opposed by a group of Portsmouth investors who wanted the bank to remain independent, according to press reports.