﻿132 
  

  

  PROCEEDINGS 
  OF 
  THE 
  CALIFORNIA 
  

  

  Chiton 
  ( 
  Lepidoradsia 
  ) 
  Magdalensis, 
  

  

  Hinds. 
  

   Fissurella 
  volcano, 
  Rve. 
  

   Callopoma 
  tessellatum, 
  Kien. 
  

   Lagena 
  nodosum, 
  Cliemn. 
  

   Tritonidea 
  insignis, 
  Rve. 
  

   Cassidulus 
  patula, 
  B7'od. 
  and 
  Sby. 
  

  

  Harpa 
  crenata, 
  Swains. 
  

   Oliva 
  venulata, 
  Lam. 
  

   Macron 
  ^thiops, 
  Rve.* 
  

   Fusus 
  Dupetithouarsii, 
  Kier 
  

   Phyllonotus 
  bicolor, 
  Val. 
  

   Murex 
  plicatus, 
  Sby. 
  

  

  Sheila 
  ooUected 
  at 
  Loreto,t 
  Lower 
  California, 
  by 
  W 
  M. 
  

   Gabb, 
  in 
  February, 
  1867. 
  

  

  BY 
  ROBERT 
  E. 
  C. 
  STEARNS. 
  

  

  Cyathodonta 
  undulata, 
  Conr. 
  

   Semele 
  bicolor, 
  C. 
  B. 
  Ad. 
  

   Chione 
  succincta, 
  Val. 
  

   Callista 
  chionaja, 
  Mke. 
  

   Tapes 
  (Cuneus) 
  grata. 
  Say. 
  

   Cyclas 
  dentata. 
  Wood. 
  

   Pecten 
  subnodosus, 
  Sby. 
  

   Bulla 
  Adamsi, 
  Mke. 
  

   Acmaea 
  fascicularis, 
  Mke. 
  

   Crucibulum 
  spinosura, 
  Sby. 
  

   Neritina 
  picta, 
  Sby. 
  

   Luponia 
  Sowerbyi, 
  Kien. 
  

   Trivia 
  Solandri, 
  Gray. 
  

   Surcula 
  funiculata, 
  Val. 
  

   Architectonica 
  granulata. 
  Lam." 
  

   Pyrazus 
  incisus 
  (dwarf 
  variety). 
  

   Natica 
  Pritchardi, 
  Fbs. 
  

   'Mamma 
  uber, 
  Val. 
  

  

  Neverita 
  Recluziana, 
  Rve. 
  

   Oliva 
  (Ispidula) 
  venulata. 
  Lam. 
  

   Olivella 
  dama, 
  Mawe. 
  

   " 
  intorta, 
  Cp7-. 
  

   Purpura 
  (Stramonita) 
  biserialis,^/a«ii;. 
  

  

  " 
  " 
  triangularis, 
  " 
  

  

  Sistrum 
  carbonarium, 
  Rve. 
  

   Engina 
  crocostoma, 
  Rve. 
  

   Columbella 
  fuscata, 
  Sby. 
  

   Conella 
  cedo-nulli, 
  Rve. 
  

   Nassa 
  tegula 
  Rve. 
  

  

  " 
  versicolor, 
  C. 
  B. 
  Ad. 
  

   Anachis 
  lyrata, 
  Sby. 
  

  

  " 
  nigricans, 
  Sby. 
  

  

  " 
  serrata, 
  Cpr. 
  

   Strombina 
  maculosa. 
  Shy. 
  

   Murex 
  plicatus, 
  Sby. 
  

  

  *Macron 
  (a 
  subgenus 
  of 
  Pseudoliva 
  made 
  by 
  the 
  Adams's) 
  , 
  includes 
  three 
  species 
  all 
  pe- 
  

   , 
  culiar 
  to 
  the 
  west 
  coast 
  of 
  North 
  America, 
  and 
  inhabiting 
  a 
  semi-tropical 
  and 
  littoral 
  station 
  

   from 
  (and 
  including) 
  San 
  Diego 
  in 
  California 
  proper, 
  thence 
  southerly, 
  and 
  both 
  coasts 
  of 
  

   Lower 
  California 
  ; 
  also 
  at 
  " 
  Cedras 
  " 
  or 
  Cerros 
  and 
  other 
  islands 
  along 
  the 
  outer 
  coast 
  of 
  the 
  

   peninsula 
  ; 
  all 
  of 
  the 
  species 
  are 
  covered 
  with 
  a 
  thick, 
  black 
  epidermis 
  ; 
  M. 
  JEthiops, 
  the 
  

   largest, 
  is 
  traversed 
  spirally 
  by 
  broad, 
  moderately 
  deep 
  grooves 
  from 
  apex 
  to 
  base 
  ; 
  while 
  M. 
  

   Kellettii, 
  A. 
  Ad., 
  has 
  generally 
  only 
  three 
  below 
  the 
  middle 
  of 
  the 
  body 
  whorl, 
  otherwise 
  

   .being 
  nearly 
  smooth. 
  The 
  most 
  northern 
  and 
  smallest 
  of 
  this 
  group 
  is 
  M. 
  lividus, 
  A. 
  Ad., 
  

   which 
  seldom 
  attains 
  the 
  length 
  of 
  an 
  inch, 
  the 
  average 
  of 
  many 
  measurements 
  being 
  .77 
  

   inch 
  ; 
  this 
  latter 
  species 
  is 
  proportionately 
  less 
  inflated 
  than 
  either 
  of 
  the 
  others, 
  and 
  is 
  not 
  

   uncommon 
  at 
  San 
  Diego 
  ; 
  the 
  other 
  species 
  are 
  comparatively 
  rare. 
  

  

  tLoreto 
  is 
  in 
  latitude 
  twenty-five 
  degrees 
  fifty-nine 
  minutes 
  N.; 
  longitude 
  113 
  degree* 
  

   twenty-one 
  minutes 
  W.; 
  Lower 
  California. 
  

  

  