10 BOOKS PUBLISHED BY MR. VAN YOORST. 



The Ground beneath us ; its G-eological Phases and Changes. 

 Three Lectures on the Geology of Clapham and the neighbour- 

 hood of London generally. By' JOSEPH PRESTWICH, F.R.S., 

 E.G.S., &c. 8vo, 3s. Qd. sewed. 



(geological Inquiry respecting the Water-hearing Strata 



of the Country around London, with reference especially to the 

 Water Supply of the Metropolis, and including some Remarks 

 on Springs. ' By JOSEPH PRESTWICH, E.G.S., &e. 8vo, 

 with a Map and Woodcuts, 8s. 6d. 



Manual of the Mineralogy of Great Britain and Ireland. 

 By ROBERT PHILIPS GREG, F.G.S., and WILLIAM G. 

 LETTSOM. 8vo, with numerous Woodcuts, 15s. 



J-Jistcry of British Fossil Mammals and Birds. By Pro- 

 fessor OWEN. This volume is designed as a companion to that 

 by Professor Bell on the (Recent Mammalia) ' British Quadru- 

 peds and Cetacea.' 8vo, with 237 Illustrations, =£1 11?. Or/., or 

 large paper (royal 8vo), £3 3s. 



Description of the Skeleton of an Sxtinct Gigantic Sloth 

 ( Mylodon robustus). With Observations on the Osteology, 

 Natural Affinities, and probable Habits of the Mesjatherioid Qua- 

 drupeds in general. By RICHARD OWEX. F.R.S., &c. 4to, 



£1 12*. 6 



jyjemoirs of Hugh E. Strickland, M.A., Deputy Reader of 

 Geology in the University of Oxford. By SIR WILLIAM 

 JARDINE. Bart. ; with a selection from his Printed and other 

 Scientific Papers. Royal 8vo, Illustrated by Maps, Geological 

 Sections, Plates and Won. 1 , 



Qmphalos. An Attempt in Untie the Q sological Knob By P. II. 

 GOSSE, F.R.S. The law of Proehronism in organic creation. 

 Post 8vo, witli 56 Illustrations on wood. 10s. ('"/. 



GENERAL NATURAL HISTORY, &c. 



■The Honey-Bee; its Natural History. Habits, Anatomy, and Mi- 

 croscopical Beauties. With Eight Tinted Illustrative Plates. By 

 JAM ES S \ MUELSON, assisted by Dr. J. BRAXTON HICKS. 

 (Forming a Second Part of Humble Creatures.) Tost 8vo, 6s. 



TTumble Creatures (Pari [.): the Earthworm and the 

 Common Housefly. Ln Eight Letters. By JAMES SAMUEL- 

 SON, assisted by J. B. HICKS, M.D. Lend., F.L.S. With Mi- 

 croscopic Illustrations by the Authors. Second Edition, post Svo, 

 3s. •'•''. 



JOHN VAN VOORST. 1 PATERNOSTER ROW. 



