Preliminary Views Research Articles

Late Precambrian and Appalachian tectonics in the light of submarine exploration on the Great Bank of Newfoundland and in the Gulf of Saint Lawrence; Preliminary views

Submarine bedrock has been directly examined both east and west of the island of Newfoundland in an attempt to locate both sides of the Appalachian fold belt. A band of almost flat-lying Silurian strata, running parallel to and within a few miles of the west coast of the island, indicates that the Appalachian fold system ends abruptly between two and eight miles off shore. On the Great Bank of Newfoundland, the lithology and structural trends of the Ballard Bank, Virgin Shoals, and Eastern Shoals suggest that the Great Bank is geologically much like the Avalon Peninsula, except along its southern flank where fairly recent sediments have accumulated.

CULTURAL STUDIES OF BOLETACEAE: GYRODON MERULIOIDES AND FOUR SPECIES OF BOLETINUS

Methods and techniques for culturing and studying species of Boletaceae in culture are described. Some preliminary views as to the possibilities and limitations of the taxonomic criteria, to be used for identifying species in culture, are discussed. Descriptions and illustrations of Gyrodon merulioides (Schw.) Sing., Boletinus cavipes (Opat.) Kalchbr., Boletinus pictus (Peck) Peck, Boletinus spectabilis (Peck) Murrill, and Boletinus grisellus Peck, which have not been previously described in culture, are presented.