Dr. Cornelis Bas is a noted Dutch mycologist.

Dr. Bas was born in Rotterdam and graduated in Biology at Leiden University

Leiden University

Leiden University , located in the city of Leiden, is the oldest university in the Netherlands. The university was founded in 1575 by William, Prince of Orange, leader of the Dutch Revolt in the Eighty Years' War. The royal Dutch House of Orange-Nassau and Leiden University still have a close...

 in 1954. In 1953, he began working at the National Herbarium of the Netherlands, as curator for the fungi, in particular, the Agaricales

Agaricales

The fungal order Agaricales, also known as gilled mushrooms , or euagarics, contains some of the most familiar types of mushrooms. The order has 33 extant families, 413 genera, and over 13000 described species, along with five extinct genera known only from the fossil record...

. Early in his career he played an important role in modernizing the collections of Dutch and European higher fungi.