The importance of natural history studies to the artist.

A lecture delivered at the seventh public distribution of prizes to the pupils of the Royal Dublin Society's Drawing School.

A monograph of the gymnoblastic or tubularian hydroids. /

Report on the Hydroida dredged by H.M.S. Challenger during the years 1873-76. /

A monograph of the fresh-water polyzoa :

including all the known species, both British and foreign.

Remarks on certain leading features in the present state of zoological science;

an address, read at the Dublin Natural History Society, on the first meeting of the session of 1843-4.