﻿160 
  j 
  

  

  year 
  1835, 
  p. 
  26, 
  the 
  shell 
  is 
  named 
  Driessena, 
  but 
  on 
  page 
  44 
  it 
  is 
  j 
  

   called 
  Dreissena. 
  Dreissena 
  is 
  also 
  used 
  in 
  Annales 
  des 
  Sciences 
  Natu-| 
  

   relies, 
  1835.) 
  , 
  

  

  Family 
  Dreissenidae 
  . 
  (Dall 
  called 
  this 
  family 
  Dreissensiidae, 
  whichi 
  

   was 
  more 
  logical 
  as 
  the 
  name 
  of 
  the 
  pharmacist 
  after 
  whom 
  the 
  

   shell 
  v/as 
  m 
  med 
  was 
  Dreissens.) 
  

  

  Genu 
  s 
  C 
  ongeria 
  Partsch 
  

   1835 
  . 
  ITiat. 
  noun 
  meaning 
  

   a 
  heap, 
  aggregation. 
  

   Also 
  called 
  Genus 
  Myti 
  - 
  

   lopsis 
  Conrad 
  185 
  7, 
  

  

  which 
  is 
  considered 
  on- 
  

   ly 
  as 
  a 
  Subgenus. 
  Myti- 
  

   lopsis 
  is 
  derived 
  from 
  

   mytilus, 
  sea-mussel 
  -i- 
  

   opsis, 
  aspect, 
  appear- 
  

   ance; 
  resembling 
  a 
  My- 
  

   tilus. 
  Fern.) 
  

  

  Congeria 
  leucophaeata 
  Conra 
  d 
  ( 
  Lat 
  . 
  dark- 
  

   colored, 
  ashy 
  gray. 
  The 
  periostracum 
  is 
  

   brownish. 
  ) 
  

  

  Conge 
  ria 
  rossmassleri 
  Reeve 
  (named 
  for 
  

   Emil 
  Adolf 
  Rossmaessler, 
  1806-1867.) 
  

  

  Congeria 
  tenebrosa 
  Reeve 
  (dark.) 
  

  

  IV. 
  SUPEKFAMILY 
  LUCINACEA 
  

  

  (Lat, 
  Lucina, 
  the 
  goddess 
  of 
  childbirth, 
  Juno.) 
  

  

  !• 
  Family 
  Diplodontidae 
  . 
  ( 
  Gr, 
  diploos, 
  double 
  -y 
  odous, 
  odont-, 
  tooth; 
  

   shells 
  having 
  a 
  hinge 
  with 
  two 
  cardinal 
  teeth 
  in 
  each 
  valve.) 
  Also 
  

   called 
  Family 
  Ungulidae 
  (Lat, 
  ungula, 
  clav/, 
  hoof, 
  nail.) 
  

  

  Diplodonta 
  nuc 
  le 
  iformis 
  Wagner 
  ( 
  shaped 
  

   like 
  a 
  kernelTT 
  

  

  Diplodonta 
  punctata 
  Say 
  (v/ith 
  dots; 
  in- 
  

   terior 
  shows 
  punctate 
  spots, 
  ) 
  

  

  Diplodonta 
  torelli 
  Jeffrey 
  s 
  (Torell' 
  s;na- 
  

   med 
  for 
  Otto 
  Torell, 
  a 
  Swedish 
  natura- 
  

   list, 
  1828-1900.) 
  

   a) 
  Genus 
  Diplodonta 
  Diplodonta 
  notata 
  Dall 
  & 
  Simpso 
  n 
  (marked, 
  

  

  branded; 
  "surface 
  with 
  delicate 
  growth 
  

  

  Genus 
  Diplodonta 
  

   Er 
  onn 
  1831 
  . 
  (Fem.) 
  

   Formerly 
  known 
  as 
  

   Genus 
  Taras 
  Risso 
  

   1826. 
  (Tar 
  as, 
  a 
  son 
  

   of 
  Neptune 
  . 
  ) 
  

  

  lines, 
  minutely 
  pitted 
  throughout 
  ."Dall. 
  ) 
  

   Diplodonta 
  semiaspera 
  Philippi 
  (half- 
  

  

  rough. 
  ) 
  

   Diplodonta 
  soror 
  C.B.Adams 
  (sister.) 
  

   Diplodo 
  n 
  ta 
  subglobos 
  a 
  C.B.Adam 
  s 
  ( 
  somewhat 
  

  

  rounded, 
  spherical. 
  T~ 
  

   Dipl 
  o 
  d 
  onta 
  venez 
  u 
  elensis 
  Dunker 
  ( 
  Ve 
  n 
  e 
  zu 
  e 
  - 
  

   . 
  la.T" 
  

  

  T 
  hyasira 
  croulinensis 
  Jeffreys 
  (from 
  

  

  Croulin 
  Island. 
  1 
  

   Thyasira 
  aequalis 
  Verrill 
  & 
  Bush 
  (equal; 
  

  

  "species 
  notable 
  for 
  the 
  equality 
  of 
  the 
  

  

  anterior 
  and 
  posterior 
  ends. 
  "Verrill 
  & 
  

  

  Bush. 
  ) 
  

   Thyasira 
  gouldi 
  Philip 
  pi 
  (Gould's; 
  named 
  

  

  for 
  Augustus 
  A. 
  Gould, 
  M.D., 
  an 
  American 
  

  

  naturalist, 
  1805-1866.) 
  

   Thyasira 
  grandis 
  Verrill 
  ( 
  large 
  . 
  ) 
  

   Thyasira 
  granulosa 
  Monterosato. 
  (full 
  of 
  

  

  granules; 
  granular.) 
  

  

  