Vlll CONTENTS. 



AHT. PACK. 



XVI. — On a peculiar arrangement of Blood-vessels in the Air-bladder of Fishes, 

 with some remarks on the evidence which they afford of the true func- 

 tion of that organ. By John Quekett, Assistant Conservator of the 

 Museum of the Royal College of Surgeons of England. - - 91) 



XVII. — On the Structure of the Animal Basis of the common Egg-shell, and 

 of the Membrane surrounding the Albumen. By William B. Car- 

 penter, M.D. ..-.-.- 109 



XVIII. — An explanation of the Cause of the rapid Decay of many Fruits, es- 

 pecially of those of the Apple and Peach Tribes. By Arthur Hill 

 Hassall, Esq. - - - - - -111 



XIX. — On the Structure of the Shells of Molluscous and Conchiferous Animals. 



By J. S. Bowerbank, Esq., F.R.S., &c. - - - 123 



XX. — Remarks on a peculiar form of Spiral Vessel. By Arthur Hill 



Hassall, Esq. ------- 155 



XXI. — On the nature of Vessels possessing Longitudinal as well as Spiral Fi- 

 bres, found in certain Plants. By Edwin J. Quekett, Esq., F.L.S. 157 



XXII. — On an instance of Monstrosity in a Moss. By Edwin J. Quekett, 



Esq., F.L.S., &c. - - - - - - 160 



XXIII. — On a Lever Movement to the Stage of the Microscope. By Alfred 



White, Esq., F.L.S., &c. - - - - - 165 



