CONTENTS. 



March, 1824. 



Art. I. — An inquirij respecting the True Nature of Instinct ^ 

 and of the Mental Distinction between Brute Animals 

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

 tory of the various faculties and actioiis of the former ■, 

 rshich have been considered to result from a degree of 

 Moral Feeling and of Intellect. By John Olives. 

 FiiENCH, Esq 1 



A«T. II. — Monograph on the Cebrionidce^ a Fantily of In- 

 sects. By W. E. Leach, M.D. F.R. Sf L.S. ifc... . 33 



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

 Scale of Nature, and on their internal Structure. By 

 Mr. John Edward Gra y ••••.... 46 



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



Thomas Bell, Esq. F.L.S. 51 



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



G. B. Son'ERBY, 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. VIIl. — Descriptions, accompanied by Figures, of 

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

 ERBT, F.L.S 58 



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



