CONTENTS. 



March, 1824. 



Page 



Aut. I. — An inquiry respecting the True Nature of Instinct , 

 and of the Mental Distinction between Brule Animals 

 and Man ; introductory to a Series of Essays, explana- 

 tory of the various faculties and actions of the former, 

 which have been considered to result from a degree of 

 Moral Feeling and of Intellect. By John Oliver. 

 French, Esq I 



Art. II. — Monograph on the Cebrionidoe, a Family of In- 

 sects. By W. E. Leach, M.D. F.R. 8f L.S. Sfc... 33 



Art. III. — On the situation and rank of Sponges in the 

 Scale of Nature, and on their internal Structure. By 

 Mr. John Edward Gray •••".... 46 



Art. IV. — Description of a new Species of Emarginula. By 



Thomas Bell, Esq. F.L.S 52 



Art. V. — Description of a new Species of Iridina. By Mr. 



G. B. Sowerby, F.L.S. 53 



Art. VI. — Some Observations on the Lamarckian Naiades, 

 and on the propriety of uniting them all under one 

 generic name. By the same 53* 



Art. VII. — Descriptions, accompanied by Figures of several 

 Helices, discovered by T. E. Bowdich, Esq. at Porto 

 Santo 56 



Art. VIII. — Descriptions, accompanied by Figures, of 

 several New Species of Shells. By Mr. G. B. Sow- 

 erby, F.L.S 58 



Art. IX. — On Balea. By Mr. John Edward Gray ... 61 



