The Goodnews Bay region as here considered embraces the territory lying south of Arolic River and draining into Kuskokwim Bay.It thus includes the Arolic and Goodnews river basins and the intermediate area.Some information regarding the area south of Goodnews Bay as far as Cape Newenham is also included in this paper.The surveys of this region in 1919 covered an area of approximately 1,400 square miles and extended from longitude 159° 40' to 162° west, and from latitude 59° to 59° 40' north.A traverse of the Yukon-Kuskokwim portage was also made.R. H. Sargent, topographic engineer, in general charge of the work, made the topographic surveys on which the geologic work north of Goodnews Bay was based.South of Goodnews Bay charts and maps of the United States Coast and Geodetic Survey were used as a base.The geologic mapping and investigation of mineral resources were done by the writer.A cook and a station assistant to Mr. Sargent completed the party.The party left Seattle on the power schooner Ozmo on June 19 and made a landing in Security Cove, just east of Cape Newenham, on the evening of July 4.About two-thirds of the supplies and provisions and all other equipment were landed in the boats of the Survey expedition at the same time.The supplies were transported throughout the season by boat or by back packing.A 30-foot poling boat and a 20-foot dory, together with a 2-horsepower gasoline engine of the detachable hang-over type, were obtained at Seattle, and the poling boat was used on Goodnews Eiver, and the dory for such shore work as was necessary.Field work ended at Kwinak (Quinhagak post office) on August 18.The return to Seattle was made by way of Bethel and the Kuskokwim-Yukon portage, Mr. Sargent with the field assistants going up the Yukon and the writer going down and continuing to St. Michael and Nome, where he spent a few days in the collection of statistics while awaiting the steamer Victoria.Transportation from St. Michael to Nome was afforded by the United 207