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MR.  BRODERIP  ON  CLAVAGELLA. 
|S.  Portion  of  a  cavity  occupied  by  a  Petricola. 
y.  Portion  of  the  cavity  of  the  larger  Clavagella  elongata. 
Broken  group  of  Serpulcs. 
e.  Group  of  tubules  proceeding  from  the  insulated  shelly  plate,  fig.  1 .  e. 
Fig.  3.  Internal  view  of  the  free  valve  of  Clavagella  elongata. 
4.  External  view  of  the  same. 
5.  Mr.  Cuming's  specimen  of  Clavagella  Melitensis. 
d.  Termination  of  the  posterior  tube  or  siphonic  sheath. 
€.  A  large  group  of  tubules  opening  into  the  perforated  shelly  plate,  at  the 
anterior  ventral  part  of  the  cavity, 
6.  Mr.  Miller's  specimen  of  Clavagella  Melitensis. 
e'.  A  large  group  of  tubules  opening  into  the  perforated  shelly  plate  on  the 
right  side  of  the  throat  of  the  posterior  tube. 
e.  Another  group  of  tubules  opening  into  a  perforated  shelly  plate  at  the  an- 
terior part  of  the  cavity. 
7.  Internal  view  of  the  free  valve  of  Mr.  Miller's  specimen  of  Clavagella  Meli- 
tensis, 
8.  External  view  of  the  same. 
