A NEW RECORD OF AN INTERESTING SPECIES, EMBLETONIA GRACILE RISBEC, FROM JAPAN (NUDIBRANCHIA-EOLIDACEA)

Abstract

Embletonia is a small genus of the family Tergipedidae, and about four species have hitherto been recorded from various waters of the world (see also MARCUS, 1957, p. 467): E. pulchra (ALDER and HANCOCK, 1844); E. faurei LABBE, 1923; E. gracile RISBEC, 1928; E. evelinae MARCUS, 1957. The specimens in hand are recognized as identical with E. gracile RISBEC, and they appear to be especially marked by the branchial papillae, each of which is divided into four twigs at the top. My thanks are due to Dr. Hirotaro HATTORI, Chief of the Biological Laboratory of the Imperial Household, Tokyo, and to Mr. Iwao HAMATANI of the Sennan Senior High School, Osaka, for placing their valuable collections at my disposal for examination. The English manuscript has kindly been revised by Mrs. Ruth L. KOBS, M. A., a Fulbright instructor of English in our University.