(1849-1929) Jesuit missionary and geologist, native of Pau, France. He served in the Franco-Prussian war, and was sent later to Madagascar to do missionary work. Here he made valuable investigations on the large Madagascar spiders and discovered the silk thread spun by them. He devised a portable contrivance on which to roll the webs of the spider, and the work of spinning and weaving was undertaken by the Ecole ProfessionelIe at Tananarivo.