a

A

MONOGRAPH

OF

THE FRESH-WATER POLYZOA,

INCLUDING

ALL THE KNOWN SPECIES,

BOTH BRITISH AND FOREIGN.

BY

GEORGE JAMES ALLMAN, M.D., F.R.C.S.I., F.R.S., F.R.S.E., M.R.I.A.,

Λιμναία κρηνῶν τέκνα.

Aristoph. Ran. 211.

J. E. ADLARD, PRINTER, BARTHOLOMEW CLOSE.

TO

THE REV. THOMAS ROMNEY ROBINSON,

D.D., M.R.I.A., F.R.A.S.,

FROM WHOSE PROFOUND KNOWLEDGE OF THE LAWS OF THE INORGANIC WORLD,

THOSE OF THE ORGANIC

HAVE ALWAYS RECEIVED FELICITOUS ILLUSTRATION AND ELOQUENT EXPOSITION,

The following Pages are inscrihed,

IN MEMORY OF THE HOURS PASSED UNDER HIS PRESIDENCY AT THE MEETINGS OF

THE ROYAL IRISH ACADEMY,

IN RECOGNITION OF A MUCH-VALUED FRIENDSHIP,

AND IN ADMIRATION OF A MIND RICHLY STORED WITH TRUTH,

TO WHICH

EVERY DEPARTMENT OF KNOWLEDGE HAS FREELY AND ABUNDANTLY CONTRIBUTED.

Edinburgh, May 2, 1857.