﻿ACADEMY 
  OF 
  SCIENCES. 
  81 
  

  

  imen 
  shows 
  obscure, 
  revolving, 
  impressed 
  lines 
  below 
  the 
  swell 
  of 
  the 
  body 
  

   whorl 
  ; 
  size 
  quite 
  uuiform. 
  Long. 
  .26 
  ; 
  lat. 
  .09 
  inch. 
  

  

  Habitat. 
  — 
  Todos 
  los 
  Santos 
  Bay, 
  Lower 
  California, 
  where 
  several 
  specimens 
  

   were 
  obtained 
  by 
  Mr. 
  Hemphill, 
  for 
  whom 
  J 
  have 
  named 
  this 
  well 
  marked 
  

   species. 
  

  

  MuRiciDEA 
  suBANGULATA, 
  Stcams. 
  Plate 
  I, 
  fig. 
  4. 
  

  

  Shell 
  small, 
  abbreviated 
  fusiform, 
  dingy 
  white 
  and 
  marked 
  spirally 
  by 
  an 
  in- 
  

   con'-picuous 
  baud 
  formed 
  of 
  three 
  reddish-brown 
  lines 
  more 
  or 
  less 
  interrupted 
  

   on 
  the 
  basal 
  and 
  the 
  preceding 
  volution 
  ; 
  whorls 
  five, 
  angulated 
  above 
  and 
  on 
  

   the 
  basal 
  whorl 
  rounded 
  below 
  the 
  angle, 
  with 
  a 
  shallow 
  sulcation 
  beneath 
  ; 
  

   surface 
  covered 
  with 
  rounded 
  and 
  irregular 
  costffi, 
  which 
  are 
  inconspicuous 
  or 
  

   obsolete 
  on 
  the 
  upper 
  whorls 
  ; 
  longitudinally 
  marked 
  with 
  from 
  seven 
  to 
  nine 
  

   irregular 
  rounded 
  ribs, 
  which 
  at 
  the 
  edge 
  of 
  the 
  angle 
  (which 
  is 
  somewhat 
  car- 
  

   inattd) 
  are 
  broken 
  into 
  angular 
  or 
  pointed 
  knobs 
  or 
  blunt 
  spines 
  ; 
  aperture 
  

   ovate, 
  angulated 
  above 
  and 
  white 
  within 
  ; 
  the 
  outer 
  lip 
  with 
  five 
  or 
  six 
  tuber- 
  

   cles 
  internally 
  ; 
  canal 
  moderately 
  prolonged, 
  slightly 
  curved 
  and 
  open 
  in 
  the 
  

   two 
  specimens 
  before 
  me. 
  Dimensions 
  of 
  largest 
  : 
  Long. 
  .89 
  ; 
  lat. 
  .41 
  inch. 
  

  

  Habitat. 
  — 
  San 
  Miguel 
  Island, 
  off 
  the 
  southern 
  coast 
  of 
  California, 
  where 
  the 
  

   specimens 
  from 
  which 
  this 
  description 
  is 
  made 
  were 
  obtained 
  by 
  Mr. 
  W. 
  G. 
  W. 
  

   Harford. 
  

  

  AsTYRis 
  VARIEGATA, 
  Stcams. 
  Plate 
  I, 
  fig. 
  5. 
  

  

  Shell 
  small, 
  elongated, 
  acutely 
  conic, 
  light 
  rufous-brown 
  or 
  sienna-yellow 
  un- 
  

   der 
  a 
  thin 
  brownish 
  or 
  greenish 
  epidermis; 
  with 
  whitish 
  median 
  and 
  sutural 
  

   bands 
  more 
  or 
  less 
  interrupted 
  ; 
  in 
  some 
  specimens 
  these 
  bands 
  are 
  connected 
  

   by 
  waved 
  lines 
  of 
  a 
  darker 
  brown 
  ; 
  surface 
  of 
  shell 
  when 
  free 
  from 
  epidermis, 
  

   smooth 
  and 
  shining, 
  marked 
  with 
  delicate 
  incremental 
  lines, 
  and 
  on 
  the 
  lower 
  

   portion 
  of 
  the 
  body 
  whorl 
  with 
  narrow 
  grooves; 
  apex 
  rounded, 
  whorls 
  seven, 
  

   convex 
  ; 
  suture 
  well 
  defined, 
  aperture 
  ovate, 
  about 
  one-third 
  the 
  length 
  of 
  the 
  

   shell 
  ; 
  outer 
  lip 
  simple, 
  in 
  some 
  specimens 
  a 
  little 
  thickened 
  with 
  small 
  tubercles 
  

   on 
  the 
  inner 
  side. 
  

  

  Dimensions 
  : 
  Long. 
  .3 
  ; 
  lat. 
  .12 
  inch. 
  

  

  Habitat. 
  — 
  San 
  Diego, 
  California, 
  where 
  numerous 
  specimens 
  were 
  collected 
  

   by 
  Henry 
  Hemphill, 
  Esq. 
  This 
  beautiful 
  species 
  resembles 
  some 
  forms 
  of 
  A';K- 
  

   deila 
  and 
  Truncaria 
  ; 
  it 
  differs 
  from 
  Aslyris 
  luberosa, 
  in 
  the 
  greater 
  convexity 
  of 
  

   the 
  whorls, 
  and 
  especially 
  in 
  being 
  without 
  the 
  angularity 
  or 
  concavity 
  which 
  

   is 
  displayed 
  in 
  the 
  lower 
  part 
  of 
  the 
  body 
  whorl 
  in 
  the 
  latter 
  species 
  ; 
  it 
  is 
  a 
  

   more 
  delicate 
  and 
  graceful 
  shell 
  than 
  either 
  of 
  the 
  other 
  forms 
  of 
  Astyiis 
  found 
  

   on 
  the 
  coast, 
  many 
  of 
  which 
  have 
  been 
  distributed 
  as 
  "Amydd" 
  or 
  " 
  Columbella" 
  

   gausapata, 
  Califcrniana, 
  carinata, 
  and 
  var. 
  Hindsii. 
  

  

  Pholas 
  Pacifica, 
  Stearns. 
  Plate 
  I, 
  figs. 
  6, 
  6a, 
  6b, 
  6c. 
  

   P. 
  Pacifica, 
  Stea'-ns, 
  Prel. 
  Dcscr. 
  August 
  28, 
  1871. 
  

  

  Shell 
  oblong, 
  beaks 
  two-fifths 
  of 
  length 
  of 
  shell 
  from 
  anterior 
  end 
  ; 
  anterior 
  end 
  

   of 
  valves 
  triangular, 
  pointed 
  ; 
  anterior 
  dorsal 
  edge 
  of 
  valves 
  reflected 
  and 
  folded 
  

  

  Proc. 
  Cal. 
  Acad. 
  Sci., 
  Vol. 
  V.— 
  6. 
  May, 
  1873. 
  

  

  