404 
CONTENTS. 
Page 
Owen,  Richard,  Esq. 
On  the  Anatomy  of  Clavagella,  Lam   269 
On  the  structure  of  the  Heart  in  the  Peren- 
nibranchiate  Batrachia   213 
On  the  young  of  the  Ornithorhynckus  para- 
doxus, Blum   221 
Description  of  a  microscopic  Entozoon  in- 
festing the  muscles  of  the  human  body.  .  315 
On  the  Anatomy  of  Lingmtula  Tanioides, 
Cuvier   825 
On  the  Osteology  of  the  Chimpanzee  and 
Orang  Utan    343 
On  the  Anatomy  of  Distoma  clavatum, 
Rud   381 
Description  of  a  new  species  of  Tape-worm, 
Tcenia  lamelligera,  Owen   385 
Remarks  on  the  Entozoa,  and  on  the  struc- 
tural Differences  existing  among  them  : 
including  suggestions  for  their  distribu- 
tion into  other  Classes   387 
RuppELL,  E.,  M.D. 
Description  d'  un  nouveau  genre  de  Mol- 
lusques  de  la  classe  des  Gasteropodes . .  259 
Smee,  Capt.  Walter. 
Some  account  of  the  Maneiess  Lion  of 
Guzerat   1 65 
Westwood,  J.  O.,  Esq. 
On  Nycteribia,  a  genus  of  Wingless  in- 
sects  275 
Yaerell,  William,  Esq. 
Observations  on  the  laws  which  appear  to 
influence  the  assumption  and  changes  of 
plumage  in  Birds   13 
Description,  with  some  additional  particu- 
lars, of  the  Apteryx  Australia  of  Shaw. .     7 1 
