In this paper, the phrases should be corrected as follows:
(page 226, right column, line 11)
For “4. Desmoceras (D.) japonicum Yabe.1)”
read “4. Desmoceras (P.) japonicum Yabe.1)”.
(page 229, left column, line 12)
For “5. Desmoceras ezoanum Matsumoto.”
read “5. Desmoceras (P.) ezoanum Matsumoto.”.
