28 
DR.  R.  E.  GRANT  ON  THE  GENUS  LOLIGOPSIS. 
mantle ;  h.  dorsal  or  ascending  aorta  ;  i.  i.  enlargements  of  the  branchial  veins  at  their 
entrance  into  the  systemic  ventricle. 
Fig.  9.  Cluster  of  ova  attached  by  their  peduncles,  and  containing  each  a  central 
yolk. 
Fig.  10.  Structure  of  the  ovum  as  seen  through  the  microscope. 
