﻿Sella 
  adamsi 
  H.C.Lea 
  ( 
  Adams 
  ' 
  ) 
  

   Sell 
  a 
  su 
  b 
  albida 
  Pall 
  (somewhat 
  white; 
  

   shell 
  white 
  with 
  pale 
  "brownish 
  spots.) 
  

  

  m 
  

  

  I) 
  

  

  44 
  i 
  

  

  simply 
  petal??) 
  

   Cerlthlopsls 
  serlna 
  Sail 
  (serine, 
  a 
  white 
  

  

  crystalline 
  suhstance; 
  shell 
  white.) 
  

   Cerlthlopsls 
  vlt 
  r 
  ea 
  Pall 
  (glassy; 
  shell 
  

  

  vitreous 
  white.) 
  

  

  f) 
  Genus 
  Cerlthiella 
  i 
  Cerlthiella 
  producta 
  Pall 
  (long, 
  length- 
  

   Verrlll 
  18«2. 
  (Pim- 
  I 
  ened.) 
  

  

  inutlve 
  of 
  aeration, 
  Cerlthiella 
  whlteavesi 
  Verrl 
  ll 
  (named 
  for 
  

   little 
  horm. 
  Fern.) 
  J. 
  P. 
  'JIThiteavesTT 
  

  

  g) 
  Genus 
  Se 
  lla 
  A.Adams 
  r 
  

   isei.rsella 
  is 
  for 
  j 
  

   Gr, 
  seira, 
  a 
  cord, 
  

   string. 
  The 
  revolving 
  

   ridges 
  on 
  each 
  whorl 
  

   look 
  like 
  little 
  

   strings 
  wound 
  around 
  

   the 
  shell. 
  Pall 
  wri- 
  

   tes; 
  "The 
  spiral 
  rlh- 
  

   iDlng 
  seems 
  to 
  charao 
  

   terize 
  the 
  shell," 
  

   Fem, 
  ) 
  

  

  11, 
  Fami 
  ly 
  Trlp 
  ho 
  ridae. 
  (Gr. 
  treis, 
  trl-, 
  three 
  r-phero, 
  to 
  hear. 
  Bear- 
  

   ing 
  three. 
  There 
  are 
  three 
  rows 
  of 
  heads 
  on 
  each 
  whorl.) 
  

  

  iT 
  rlphora 
  ahrupta 
  Pal 
  l 
  (abrupt; 
  form 
  ab- 
  

   ruptly 
  tapered. 
  y 
  

  

  Trlpho 
  r 
  a 
  hlgenma 
  Watson 
  (with 
  two 
  preci- 
  

   ous 
  stones; 
  shell 
  yellowish 
  white 
  or 
  pu- 
  

   re 
  white 
  on 
  the 
  upper 
  part 
  of 
  the 
  spire; 
  

   there 
  is 
  a 
  suffused 
  pale 
  tint 
  of 
  "brov/n 
  

   on 
  the 
  "base 
  of 
  each 
  whorl.) 
  

  

  T 
  rlphora 
  higeiTima 
  hircus 
  Pal 
  l 
  (hi 
  reus 
  j 
  a 
  

   he-goatTT 
  

  

  Trlphora 
  col 
  on 
  P 
  all 
  (colon.) 
  

  

  Trlphora 
  cylln 
  drel 
  la 
  Pall 
  (Pall 
  writes: 
  

   " 
  Ov;ing 
  to 
  the 
  anterior 
  taper, 
  this 
  spe- 
  

   cies 
  has 
  the 
  aspect 
  of 
  a 
  diminutive 
  Cy- 
  

   llndrella. 
  " 
  

  

  Trlphora 
  d 
  ecorat 
  a 
  ollv 
  ac 
  ea 
  Pall 
  (decora- 
  

  

  ~ed7~dorned, 
  mottled; 
  ollvacea: 
  olive- 
  

   color. 
  ) 
  

  

  ±£iEl}2.I§:_lila£iO.§:_5§ii 
  (lilac; 
  shell 
  of 
  

   a 
  rich 
  pink 
  lilac 
  color.) 
  

  

  Trlphora 
  longlssima^Pall 
  (very 
  long; 
  shell 
  

  

  1 
  very 
  much 
  elongated.! 
  

  

  • 
  Trlp 
  hora 
  me 
  lanura 
  C 
  . 
  B 
  . 
  Adams 
  . 
  ( 
  Gr 
  . 
  hlack- 
  

  

  j 
  tailed; 
  "the 
  apex 
  is 
  dark 
  brown.) 
  

  

  iTrJ-phora 
  mirabll 
  is 
  C.B.Adams 
  (admirable; 
  

  

  ] 
  remarkable 
  for 
  the 
  small 
  size 
  of 
  the 
  a- 
  

  

  i 
  perture 
  . 
  ) 
  

  

  j 
  Tr 
  i£ho 
  ra_nl 
  gro 
  cl 
  nc 
  ta 
  C 
  . 
  B 
  . 
  Adams 
  (girdled 
  

  

  I 
  with 
  black; 
  shell 
  brown 
  Y/ith 
  a 
  dark 
  

  

  I 
  brown 
  base. 
  ) 
  

  

  T 
  r 
  1 
  Bbp.Zg:-""^^"'^ 
  ^^^^ 
  nigroclnct 
  a 
  C.B.Adams 
  

   "[perversa, 
  left 
  handed; 
  spiral 
  turns 
  to 
  

   the 
  left. 
  Is 
  the 
  same 
  as 
  preceding 
  one.) 
  

  

  Genus 
  Tr 
  lphora 
  Blain- 
  

   ville 
  1828 
  . 
  TFem.! 
  

  

  