This  type  closely  approaches  the  cosmopolitan  fresh-water  species  C.  botrytis^
previously  described.  In  addition,  however,  to  its  salt-water  habitat  and  the  broader
contour  of  the  animalcules,  it  may  be  readily  distinguished  from  that  species  by  the
more  attenuate  and  less  rigid  growth  of  the  primary  pedicle,  by  the  greater  length  of
the  secondary  ones,  and  Uie  in  general  more  erect  position  assumed  by  the  indi-
vidual zooids ;  this  latter  feature  is  a  necessary  accompaniment  of  the  comparatively
rigid  consistence  of  the  short  secondary  pedicles  which  immediately  support  the
animalcules.  It  would  seem  to  be  not  altogether  improbable  that  the  so-called
variety  of  Codosiga  botrytis  recently  figured  and  described  by  C.  Robin,  characterized
by  similarly  developed  secondary  footstalks,  represents  the  type  now  under  considera-
tion. This  supposition  receives  substantial  support  from  the  circumstance  that,
although  no  habitat  is  recorded,  the  majority  of  accompanying  infiisorial  types
described  by  him  are  essentially  inhabitants  of  salt  water.
The  examples  of  Codosiga  pyriformis  examined  by  the  author  were  obtained
growing  abundantly  on  the  deserted  polyparies  of  Hydroid  zoophytes  and  Polyzoa
received  from  Brighton.
Oodosiga  ftiroata^  S.  K.    Pl.IL  Fios.  15-19.
Zooids  shortly  and  obtusely  ovate,  attached  singly  or  in  pairs  by  foot-
stalks of  about  their  own  length  to  a  short  and  irr^^lar,  furcately  branching
pedicle.  Length  of  bodies  1-3300",  height  of  primary  pedicle  rarely  ex-
ceeding that  of  a  single  zooid.     Hab. — Fresh  water.
This  species  may  be  readily  distinguished  from  all  the  preceding  forms  by  the
character  of  the  pedicle  which  conunences  branching  at  a  short  distance  only  from

Z   2


340  ORDER  CHOANOFLAGELLATA.
