This Day in History: 1861-06-17

Isao Ijima (1861-1921) was born on this day.
He was a Japanese zoologist, professor at Tokyo Imperial University (1885 – 1921), active in many fields including Turbellarians (flat worms) and sponges. 2nd director of the Misaki Marine Biological Station, Japan (1904 – 1921). Considered to be the father of parasitology in Japan. Publications on sponges include Studies on Hexactinellida (1901) and the report on The Hexactinellida of the Siboga Expedition (1926) a Dutch zoological and hydrographic expedition to Indonesia (1899 – 1900).

Ijima described numerous taxa and is honoured in the names of a number of species under ijimai and ijimae.