ASCIDIANS COLLECTED BY MESSRS. RENZI WADA AND SEIZI WADA FROM THE PEARL-OYSTER BED IN THE ARAFURA SEA IN 1940

摘要

The present material consists of 27 species collected by Mr. RENZI WADA of the former Nan'yo Pearl Company and Mr. SEIZI WADA, an associate of the former Palao Tropical Biological Station, from the pearl-oyster bed off Melville in the Arafura Sea during the period from September to November of 1940. I express here my hearty thanks to Messrs. R. W ADA and S. W ADA for their kindness in offerring me the present precious material. I am also very grateful to Prof. T. KOMAI for his kind guidance and incessant encouragement. The present work is a part of the study progressed by the financial aid from the Ministry of Education.