'A Farther Account of the Generation of Eels and the Variety of it in the Worm kind particulariz'd in the Worm, Snail and Oyster' communicated to Hans Sloane by Benjamin Allen Discussing reproduction of eels, earthworms, snail and oyster Figures in text; p. 110 shows The brain of the Eeel - the upper side and the underside; an adders brain; a hard snail; the penis, and the bottles uterus; The oyster p. 111 shows The Great Colts Foot Oyster; the underside, with the heart, and the liver Read to the Royal Society on 19 and 26 June 1729 1729