[EXHIBIT 21a TO COLONIAL GAS COMPANY FORM 10-K FOR YEAR ENDED DECEMBER 31, 1997] Colonial Gas Company Subsidiaries of Registrant Subsidiaries:			Organized in:		Ownership: (a) Transgas, Inc.		Massachusetts		100% (a) CGI Transport Limited(b)	Canada			100% (a) Included in consolidated financial statements. (b) Owned by Transgas. [END OF EXHIBIT 21a TO COLONIAL GAS COMPANY FORM 10-K FOR YEAR ENDED DECEMBER 31, 1997]