Vlllf CONTENTS. 



Page 

 of the Bernhard Crab ; On a new American Otter, by Mr. G. 

 Barnston ; On Planorbis crista, by Lovell Reeve, F.L.S. ; On the 

 Occurrence of Lymncea stagnalis in Scotland, by Robert O. 

 Cunningham, Esq. ; Descriptions of two new Species of Pye- 

 nogonoidea, by George Hodge; On Aquatic Hymenoptera, by 

 Mr. J. tubbock ; On the Appearances of Cotton-fibre during 

 Solution and Disintegration, by Charles O'Neill, F.C.S. ; On a 

 singular Malformation of the Beak and Foot in the Young of the 

 Domestic Fowl, by Mr. W. Horn 457—467 



IndiBX 468 



PLATES IN VOL. XI. 



Plate I. Transformations of the Porcellanae. 

 XL Glyptolepis of Dura Den. 



III. Cercocalamus coUaris. — Brachyurophis semifasciata.— Teleur- 



aspis nummifera. 



IV. Platyplectrum marmoratum. — Cryptotis brevis. — Hyla Krefftii. 

 V. Coal-Measure Crustacea. 



VI. Composition of the Head, &c., in Insects. 

 VII. Ascidia parallelogramma. — Molgula arenosa. 



IX ' i Structure and Development of Amoeba villosa and other Rhizo- 

 XI. New British Species of Acantholeberis. 



