Plate, 'A lamprey of the natural size laid open, to show the ovarium at the time the eggs begin to be shed; a portion of the ovarium and testicle of the natural size' by William Clift Plate XIX containing figures 1 and 2 in grey watercolour. The illustrations show the ovarium and testicle of the lamprey, a type of jawless fish. Subject: Zoology Published in Philosophical Transactions as 'On the mode of generation of the lamprey and myxine'. Read 15 June 1815. [1815]