Department of Parasitology and Hydrobiology Charles University Faculty of Science Vinicna 7 CZ-128 44 Prague 2 Czech Republic REPRESENTATIVES phone e-mail fax head: Assoc. Prof. Petr Horak, Ph.D. +420 2 21953196 horak@natur.cuni.cz +420 2 24919704 deputy: Dr. Martin Cerny, Ph.D. +420 2 21953414 cerny@natur.cuni.cz +420 2 24919704 administration: Dr. Helena Kulikova +420 2 21953409 parazit@natur.