Mayor Marion Barry received $200,216 more in contributions within the past six weeks for his reelection campaign, bringing his total campaign treasury to $378,275--nearly twice as much as any of his challengers in the Sept. 14 Democratic primary.

City Council member John Ray (At-large), who was the first to officially announce his candidacy, remained the most effective fund-raiser among the challengers with a total of $226,557. But only $22,765 of that amount was raised over the past month--indicating a clear decline in the rate that Ray is raising money for his campaign.

Former Carter administration Cabinet secretary Patricia Roberts Harris, who began fund-raising only two weeks ago, raised $80,000--much of it from lawyers in Washington and throughout the nation. While Harris raised more during the past month than any other candidate, she still remained far behind Barry and several others in campaign contributions.

Council member Betty Ann Kane (At-large) raised $55,522 in the Feb. 1 to March 10 reporting period, bringing total contributions to her campaign treasury to $80,382.

Council member John A. Wilson (Ward 2), who had reported raising $96,048 by the end of January, raised $11,469 for the past month.

The fund-raising totals, based on reports filed yesterday with the campaign finance office of the D.C. Board of Elections and Ethics, indicated a strong dominance by Barry in the efforts to raise money to support vital staff and advertising operations that most candidates have estimated will cost $500,000 or more.

Barry's campaign treasurer Ann Kinney said, "I think we're doing very well," after she delivered her report to the office of campaign finance yesterday.

Charles T. Duncan, treasurer for the Harris campaign, said, "We were most gratified by this showing of support, especially since Mrs. Harris filed her declaration of intent only 16 days ago. This showing, plus other expressions of support, which the candidate has been receiving, ensures a vigorous and hard-fought camapaign."

Kane's campaign treasurer Dianna Brochendorff said many of the contributions given to Barry were those usually received by incumbents. "I feel good because the people we received money from say it was just a down payment on other funds they will give," she said. "I feel particularly good that Ray only raised $22,000 and he has had so much advertising out. If I were Pat Harris and on the board of IBM I think I would have raised more money."

Wilson said Barry's outstanding fund-raising performance will not put him out of the race. "We've raised a total of $109,000 and we're doing just fine," Wilson said. "We don't have any problems. We're on schedule. We don't expect to raise money with the mayor or with Mr. Ray, although it looks like he Ray is slacking off."

Ray's press secretary, Margaret Gentry, said Ray regards his relatively low amount of contributions as a result of a low point in the fund-raising cycle and not as a sign of a drop in his popularity.

"It's getting harder to raise money," Gentry said. "But everybody is going to find it's harder the longer they continue raising money. Our grand total still looks good." Ray's financial statement indicated that while he has raised $226,557, he has already spent $171,811.

Barry's dominance of fund-raising appeared to be of large contributors as well as small contributors. He had 111 contributions of $500 or more among about 800 donations.