CONTRIBUTIONS TO JAPANESE ASCIDIAN FAUNA -IX.RE-DESCRIPTIONS OF OKA'S SPECIES FOUND IN "FIGURARO DE JAPANAJ BESTOJ"-

Abstract

A. OKA (1927) gave brief descriptions of a number of ascidian species in "Figuraro de Japanaj Bestoj" under new names, each with an explanatory note "(仮)" at the end. This note indicates that the name is given provisionally without full description nor sufficient consideration on the identification. Some of these species were redescribed or some names were replaced with known ones by 0KA himself, but eight species remain still untouched in the revised edition of the "Illustrated Encyclopedia of the Fauna of Japan" (1947); they are each marked with (MS) at the end of the name. I had chances to re-examine some type specimens or specimens identified by OKA himself and by this date I could give redescriptions of three species and found out that two are synonyms of the species already known to us. Here, the last three provisional species are redescribed each on the type specimen kept in the Zoological Institute of the Tokyo University of Education.