Being the substance of Three Courses of Lectures delivered before the Royal Institution of Great Britain.

By T. RYMER JONES, F.R.S., Professor of Zoology in King's College, London.

Post 8vo. Vol. I. with 105 Illustrations; Vol. II. with 104 Illustrations, 12s. each.

"These volumes form one of the best and completest introductions to Natural History we have ever met. The first volume, beginning with Sponges, contains an account of Zoophytes and creatures very low in the scale of creation; the second volume treats of Insects and beings rather more highly organized, and ends with them. We have already said the illustrations are excellent; they are numerous also, and furnish a great addition to the beauty and interest of the volume." - Guardian.