CONTENTS. 
V 
XXVII.  Description  d'un  nouveau  Genre  de  MoUusques  de  la  Classe  des  Gasteropodes 
Peetinibranches.    Par  E.  Ruppell,  M.D.,  Memb.  Ext.  L.S.  ^  Z.S.    page  259 
XXVIII.  On  Clavagella.  By  W.  J.  Broderip,  Esq.,  Vice-President  of  the  Geological 
and  Zoological  Societies,  F.R.8.,  L.S.,  S^c  261 
XXIX.  On  the  Anatomy  of  Clavagella,  Lam.  By  Richard  Owen,  Esq.,  F.R.S.  Z.S., 
Assistant  Conservator  of  the  Museum  of  the  Royal  College  of  Surgeons  in  Lon- 
don 269 
XXX.  On  Nycteribia,  a  Genus  of  Wingless  Insects.  By  J.  O.  Westwood,  Esq., 
F.L.S.,  ^c.    Communicated  by  the  Secretary  275 
XXXI.  Some  Account  of  Macropus  Parryi,  a  hitherto  undescribed  Species  of  Kangaroo 
from  New  South  Wales.    By  E.  T.  Bennett,  Esq.,  F.L.S.,  Sec.  Z.S.  .    .  295 
XXXIL  On  the  Genus  Chama,  Brug.,  with  Descriptions  of  some  Species  apparently  not 
hitherto  characterized.  By  W.  J.  Broderip,  Esq.,  Vice-President  of  the  Geolo- 
gical and  Zoological  Societies,  F.R.S.,  L.S.,  ^c  301 
XXXIII.  Characters  and  Description  of  a  new  Genus  of  the  Family  Melolonthidae.  By 
John  Curtis,  Esq.,  F.L.S.,  ^c.    Communicated  by  the  Secretary    .    .    .  307 
XXXIV.  On  a  species  of  Moth  found  inhabiting  the  Galls  of  a  Plant  near  to  Monte  Video. 
By  John  Curtis,  Esq.,  F.L.S.,  S^c.    Communicated  by  the  Secretary    .    .  311 
XXXV.  Description  of  a  Microscopic  Entozoon  infesting  the  Muscles  of  the  Human  Body. 
By  Richard  Owen,  Esq.,  F.R.S.  8f  Z.S.,  Assistant  Conservator  of  the  Museum 
of  the  Royal  College  of  Surgeons  in  London  ...315 
XXXVI.  On  the  Anatomy  of  Linguatula  Tsenioides,  Cuv.  By  Richard  Owen,  Esq., 
F.R.S.  Z.S.,  Assistant  Conservator  of  the  Museum  of  the  Royal  College  of  Sur- 
geons in  London  325 
XXXVII.  Additional  Remarks  on  the  Genus  Lagotis,  with  some  Account  of  a  second  Spe- 
cies referrible  to  it.    By  E.  T.  Bennett,  Esq.  F.L.S.,  Sec.  Z.S.     .    .    .  331 
XXXVIII.  Observations  on  the  Genus  Cancer  of  Dr.  Leach  (Platycarcinus,  Latr.,),  with 
Descriptions  of  three  new  Species.  By  Thomas  Bell,  Esq.,  F.R.S.,  L.S.,  G.S., 
8f  Z.S  335 
XXXIX.  On  the  Osteology  of  the  Chimpanzee  and  Orang  Utan.  By  Richard  Owen, 
Esq.,  F.R.S.  ^  Z.S.,  Assistant  Conservator  of  the  Museum  of  the  Royal  College  of 
Surgeons  in  London  343 
XL.  On  the  Anatomy  o/Distoma  clavatum,  Rud.  By  Richard  Owen,  Esq.,  F.R.S.  &^ 
Z.S.,  Assistant  Conservator  of  the  Museum  of  the  Royal  College  of  Surgeons  in 
London  381 
XLI.  Description  of  a  new  Species  of  Tape-worm,  Taenia  lamelligera,  Owen.  By  Richard 
Owen,  Esq.,  F.R.S.  &f  Z.S.,  Assistant  Conservator  of  the  Museum  of  the  Royal 
College  of  Surgeons  in  London  385 
