144 
MR.  BRODERIP  ON  SOME  NEW  SPECIES  OF  BRACHIOPODA. 
The  rounded  anterior  edge  of  this  shell  is  green,  and  the  transverse  lines  of  that 
colour  are  produced  by  the  progressive  increase  of  the  shell,  which  is  smooth  and  parch- 
ment-Uke.  In  all  the  dried  specimens  the  thin  anterior  edge  is  contracted  into  a  square 
form,  so  as  to  produce  a  resemblance  to  a  very  square-toed  shoe ;  but  in  its  natural 
state  this  edge  is  rounded.  A  general  contraction,  moreover,  gives  the  dried  shells  a 
narrower  and  more  ventricose  character  than  they  really  possess  ;  and  the  remains  of 
the  cilia  of  the  Iranchioe  give  to  their  anterior  edges  a  bearded  appearance.  The  di- 
mensions above  given  were  taken  from  the  largest  specimen  which  I  have  seen :  the 
individual  dissected  by  Mr.  Owen  is  comparatively  small. 
Mr.  Cuming  found  this  species,  which  bears  the  name  of  the  Baron  de  Ferussac,  at 
about  half-tide,  in  an  extensive  bottom  of  hard  coarse  sand,  from  four  to  six  inches 
below  its  surface.  The  extent  of  the  sand  was  about  twelve  miles  long,  and  two  miles 
wide. 
2.  LiNGULA  Semen. 
Tab.  XXIII.  Fig.  17. 
Ling,  testa  ovato-ohlongd,  crassiusculd,  pland,  albidd,  lavissimd,  politd,  limbo  anteriore 
rotundato. 
Long.  1%  poll.,  lat. 
Hob.  ad  Insulam  Platam. 
Mus.  Cuming. 
This  shell,  the  only  one  I  have  seen,  was  dredged  by  Mr.  Cuming  in  fine  coral  sand 
from  a  depth  of  seventeen  fathoms.  It  may  be  a  young  individual ;  but  the  shell  is  so 
much  firmer  than  it  usually  is  in  Lingula  (so  firm,  indeed,  as  not  to  have  contracted  at 
all  in  drying),  that  I  cannot  but  look  on  it  as  an  undescribed  species.  In  size  and  ap- 
pearance it  bears  a  near  resemblance  to  a  melon  seed. 
Mr.  Cuming  informs  me  that  he  found  another  specimen,  about  a  Une  longer,  at  the 
same  time  and  in  the  same  place,  but  that  he  has  unfortunately  mislaid  it. 
PLATE  XXII. 
Fig.  1.  Terebratula  Chilensis. 
2.  Terebratula  Uva. 
PLATE  XXIII. 
Fig.  1.    Orbicula  Cumingii. 
1*.  Orbicula  strigata. 
2.    Orbicula  lamellosa. 
14.    Li  ngula  Audebardii. 
17.    Li  NGULA  Semen. 
