The names "Meyer Lansky" and "Robert Vesco," each followed by a figure of "several million dollars," were found in a ledger seized by police during a drug raid here Sunday, police sources said here today.

The ledger does not explain the significance of the entries, and police only had speculation as to their meaning, saying no other evidence had been uncovered tying the two men to the 21 persons who were arrested on related drug charges here this week.

Lansky, once believed to be the kingpin of Havana gambling circles, is now living in Miami Beach. Vesco, a financier who fled the United States while facing charges of embezzlement and illegally contributing to Richard M. Nixon's 1972 presidential campaign, was last presumed by federal authorities to be living in Costa Rica.

U.S. Drug Enforcement officials said Thursday they had not seen the ledgers. Agents were dispatched from the regional DEA office in Boston to begin examining the ledger and other evidence seized by Warwick police.

The ledger was seized in the first of five raids in two waterfront communities this week in which police seized 5 1/2 tons of marijuana small amounts of hashish and cocaine and $365,000 in cash. The 21 persons charged with narcotics violations had addressed in Rhode Island, Florida, Virginia and Ohio.

Police are seeking a number of other people for questioning in Rhode Island and Florida.

The ledger, apparently used for record-keeping, contained a description of a shipment of 371 bales of marijuana and three bales of hashish, according to police. The ledger also mentioned a Jamaican registered fishing vessel, the Dorchester.

While it was in Rhode Island waters, the Dorchester was boarded by U.S. Customs officials suspicious because the "fishing" vessel had no fishing equipment. They found nothing holds that had been newly painted, and the Dorchester was allowed to depart.

The ledger also has notations, according to law enforcement officials, referring to 20 trucks, six airplanes and four boats, believed by police to have been used to bring the marijuana to the New England shore and then to distribute it in New England and New York state.