CONTENTS. 
I.  On  the  M'hoiT  Antelope.    By  E.  T.  Bennett,  Esq.,  F.L.S.,  Sec.  Z.S.  .    .    page  1 
II.  On  the  Nervous  System  o/Beroe  Pileus,  Lam.,  and  on  the  Structure  of  its  Cilia.  By 
Robert  E.  Grant,  M.D.,  F.R.S.  Ed.,  L.S.,  G.S.,  Z.S.,  S^c,  Professor  of  Com- 
parative Anatomy  and  Zoology  in  the  University  of  London  ......  9 
III.  Observations  on  the  Laws  which  appear  to  influence  the  Assumption  and  Changes  of 
Plumage  in  Birds.    By  William  Yarrell,  Esq.,  F.L.S.    Z.S.      ...  13 
IV.  On  the  Structure  and  Characters  of  Loligopsis,  and  Account  of  a  Neiv  Species  (Lol. 
guttata,  Grant,)  from^  the  Indian  Seas.  By  Robert  E.  Grant,  M.D.,  F.R.S. Ed., 
L.S.,  G.S.,  Z.S.,  ^c,  Professor  of  Comparative  Anatomy  and  Zoology  in  the  Uni- 
versity of  London  ..    ..........    21 
V.  On  the  Character's  and  Description  of  a  nevj  Genus  of  Carnivora,  called  Cynictis. 
By  W.  Ogilby,  Esq.,  A.M.,  F.L.S.,  R.Ast.  S.,  Z.S.,  S^c   .  29 
VI.  On  the  Chinchillidte,  a  Family  of  Herbivorous  Rodentia,  and  on  a  new  Genus 
referrible  to  it.    By  E.  T.  Bennett,  Esq.,  F.L.S.,  Sec.  Z.S.  .....  35 
VII.  On  the  sacculated  Form  of  Stomach  as  it  exists  in  the  Genus  Semnopithecus,  F.  Cuv. 
By  Richard  Owen,  Esq.,  F.Z.S.,  Assistant  Conservator  of  the  Museum  of  the 
Royal  College  of  Surgeons  in  London  65 
VIII.  Description,  with  some  additional  Particulars,  of  the  Apteryx  Australis  of  Shaw. 
By  William  Yarrell,  Esq.,  F.L.S.  ^  Z.S  71 
IX.  On  the  Anatomy  of  the  Sepiola  vulgaris,  Leach,  and  Account  of  a  New  Species 
(Sep.  stenodactyla,  Grant,)  from  the  Coast  of  Mauritius.  By  Robert  E.  Grant, 
M.D.,  F.R.S.  Ed.,  L.S.,  G.S..,  Z.S..,  &;c..  Professor  of  Comparative  Anatomy  and 
Zoology  in  the  University  of  London   77 
X.  On  a  new  Genus  in  the  Family  o/Corvidae.    By  Mr.  John  Gould,  F.L.S.  Commu- 
nicated by  the  Secretary  87 
XI.  Characters  and  Descriptions  of  several  Neiv  Genera  and  Species  of  Coleopterous 
Insects.    By  the  Rev.  F.  W.  Hope,  A.M.,  F.L.S.    Z.S   .  91 
