200 
MR.  BRODERIP'S  DESCRIPTIONS  OF  SOME 
10.  Calyptr^ea  hispida. 
Tab.  XXVII.  Fig.  10. 
Cal.  testa  subovatd,  subconicd,  albd  strigis  maculisque  subpurpureo-fuscis  varid,  striis  fre~ 
quentibiis  et  spinis  tubularibus  erectis  hispidd ;  limbo  crenulato ;  apice  turbinato , 
cyatho  subdepresso. 
Diam.  ^  poll.,  lat.  iV,  alt. 
Hob.  in  sinu  Guayaquil.    (Island  of  Muerte.) 
This  elegant  species,  the  circumference  of  whose  somewhat  depressed  cup  is  free 
with  the  exception  of  one  part,  where  it  adheres  laterally,  was  found  on  dead  shells  in 
sandy  mud  at  a  depth  of  twelve  fathoms. 
11.  Calyptr/ea  maculata. 
Tab.  XXVIL  Fig.  11. 
Cal.  testd  ovatd,  albidd  purpureo-fusco  maculatd,  longitudinaliter  rugosd ;  limbo  serrato  ; 
apice  subturbinato,  subincurvo. 
Diam.  -H-  poll.,  lat.  -jV,  alt.  -f. 
Hab.  in  sinu  Guayaquil.    (Island  of  Muerte.) 
The  external  contour  of  this  shell,  more  especially  in  the  position  of  the  subturbi- 
nated  apex,  much  resembles  that  of  Ancylus.  The  circumference  of  the  cup  is  free,  ex- 
cepting at  one  point,  where  it  adheres  laterally  throughout  its  length. 
Found  in  sandy  mud  on  dead  shells,  at  a  depth  of  eleven  fathoms. 
12.  Calyptr^a  serrata. 
Tab.  XXVIII.  Fig.  1. 
Cal.  testd  suborbiculari,  albd,  subpurpureo  velfusco  interdum  fucatd  vel  strigatd,  costis  Ion- 
gitudinalibus  prominentibus  rugosis ;  limbo  serrato ;  apice  subturbinato ;  cyatho  valde 
depresso. 
Diam.  .!  poll.,  lat.  -pV,  alt. 
Hub.  ad  Real  Llejos  et  Muerte. 
Var.  testa  alba. 
Found  on  dead  shells  in  a  muddy  bottom,  at  the  depth  of  from  six  to  eleven  fathoms. 
There  is  a  variety  entirely  white. 
Subgenus  Syphopatella,  Less.  ? 
Cyatho  sou  potius  lamina  interna  subtrigona,  subcirculari,  latere  dextro  replicato. 
I  think  it  very  probable  that  the  five  following  species  belong  to  M.  Lesson's  sub- 
genus Hypliopatella  ;  but  no  reference  is  given  in  the  '  Zoologie',  and  in  a  family  where 
