The Elysiadse are shelless mollusca with no distinct mantle
or respiratory organ, all being performed by the ciliated
surface of the body. The stomach is central; the hepatic
organ branched, extending almost the whole length of the
animal; eyes sessile, and tentacles simple or obsolete.
There are five known genera of the family, viz.:
—
Elysia,
with tentacles; Actaeonia, leech-like and with tentacles;
Genia leech-like, linear dorsal tentacles; Limapontia, head
truncated and with arched lateral ridges; Rhodope, wormlike.
To this family I have found an addition of marked and
peculiar generic character. This new genus I propose to dedicate
to Mr. Morton Allport, as a slight mark of appreciation
of his great services to science and acclimatization in
Tasmani
