Prince George's County's new sheriff, James V. Aluisi, has asked the county government to do a complete audit of his department after receiving a report Tuesday listing 20 guns as missing.

The report, completed last Friday by Maj. Guy V. Williams, who was chief deputy to former sheriff Don Edward Ansell, says that 20 guns, one of them as shotgun, were missing on June 1, 1977.

Ansell, reached by phone last night, also acknowledged that another siz shotguns disappeared from the sheriff's department at some point. He said the department was given 13 shotguns by police in 1966, eight years before he became sheriff, and, "this year they asked for them back. We could only find seven. I don't know where the other six went. I never saw them."

Aluisi, a Democrat elected last month, said that if the audit, which he requested Tuesday in a letter to County Council Chairman William B. Amonett, fails to turn up the guns, he will report them missing to the federal Alcohol, Tobacco and Firearms Bureau and to all local police jurisdictions.

Aluisi told a reporter, "Don never mentioned anything to me about missing guns or anything like that. I don't know if he knew about them or not. Maybe they were transferred somewhere else and not recorded. But I know to know one way or the

"The big-hold-up is the change in other."

Ansell, who did not seek reelection, was asked by a reporter two weeks ago if any guns wre missing from the Sheriff's department. He replied at the time: "There is not one single gun missing from this department. Not a single, solitary gun. You print that there are any guns missing and I'll sue you because you'll be calling me a thief, and I'm no thief."

Last night Ansell's initial reaction was similar: "Someone's giving you a false report . . .There are no guns missing."

After Maj. Williams' report was described to him, Ansell said, "Well, there were two guns missing at one time, that true. One of them was found Friday in the state's attorney's office [that is noted in the report] and another one I had at home, but I'd forgotten about it until someone reminded me, because I never wore it."

When the report was further described to the former sheriff, he called Williams, then recalled the circumstances: "We found about 30 or 35 missing.

"When we started looking, we got the number down to 20, but we never did find the rest. Two were listed to a deputy in St. Mary's County, but he denies ever having them. The rest we decided were inverted serial numbers [of other guns that had been in the department's possession].It's possible the guns never existed. That's what I think."

Aluisi said he isn't trying to blame the apparent absence of the guns on anyone.

All I'm trying to do is start with a clean slate," he said. I'm sheriff now and I'm responsible for anything in this department."

Aluisi said that in addition to the guns, $200 in cash confiscated during an eviction is missing, and the number of warrants in the department's files is almost double the number quoted to him by Ansell.

Ansell said he had left Aluisi a note telling him of the missing $200. It was last in the hands of one of our lieutenants and he can't come up with it," Ansell said. He added that he could not explain why there were 17,376 warrants on file when he had told Aluisi there were about 9,000.

I told him there were warrants for more 9,000 people," Ansell said. According to an audit completed yesterday, the 17,376 warrants are for 14,959 persons-some have more than one warrant issued for them. Both Ansell and Aluisi agreed that almost half of those warrants are unservable because the persons they name have moved out of the state.