Brett Morris, also the top try scorer
terry matterson
If you are talking about Rugby Union, believe it or not it is a Japanese player, Daisuke Ohata, with 69 tries (data correct on the 11th of April of 2008, as the player is still active).
Jonah Lomu is former rugby player for New Zealand. He is famous for his lightening speed and massive tackles while playing. In the process, he became the highest try scorer in the Rugby World Cup.
Colin Charvis of Wales.
Bryan Habanna with 8 trys
John Kirwan, NZ, 67.