﻿OLD 
  AND 
  NEW 
  WORLD 
  MELANIANS 
  — 
  MORRISON 
  379 
  

  

  Subgenus 
  Thiara 
  Roding, 
  1798, 
  sensu 
  stricto. 
  

  

  Genotype: 
  Thiara 
  (Thiara) 
  amarula 
  (Linnaeus), 
  1758. 
  

  

  The 
  animals 
  of 
  Thiara 
  spp. 
  from 
  Szechwan, 
  China, 
  Mindanao, 
  

   Philippine 
  Islands, 
  and 
  Okinawa, 
  Ryukyu 
  Islands, 
  have 
  been 
  exam- 
  

   ined 
  by 
  me 
  and 
  found 
  to 
  possess 
  the 
  reproductive 
  structures 
  described 
  

   above 
  as 
  distinguishing 
  characteristics 
  of 
  the 
  family 
  (pi. 
  11, 
  figs. 
  9, 
  11). 
  

  

  Subgenus 
  Setaeara 
  Morrison, 
  1952 
  

  

  Genotype: 
  (Thiara 
  cancellata 
  Roding 
  1798=) 
  Thiara 
  (Setaeara) 
  

   cancellata 
  Roding 
  1798. 
  

  

  The 
  genotype 
  has 
  been 
  known 
  for 
  many 
  years 
  under 
  the 
  name 
  of 
  

   setosa 
  Swainson 
  because 
  the 
  far 
  earlier 
  name 
  of 
  Roding 
  has 
  not 
  

   hitherto 
  been 
  critically 
  examined. 
  These 
  shells 
  possess 
  stronger 
  

   spiral 
  sculpture 
  than 
  those 
  of 
  Thiara, 
  sensu 
  stricto, 
  and 
  the 
  "crown" 
  

   of 
  spines 
  on 
  the 
  shoulder 
  of 
  the 
  whorls 
  is 
  continued 
  upward 
  as 
  a 
  set 
  

   of 
  cuticular 
  setae, 
  easily 
  broken 
  off, 
  and 
  almost 
  always 
  missing 
  from 
  

   imperfect 
  shells. 
  This 
  group 
  of 
  only 
  a 
  few 
  species 
  was 
  proposed 
  as 
  

   a 
  subgenus 
  (Morrison, 
  1952, 
  p. 
  8) 
  imtil 
  animal 
  characters 
  are 
  found 
  

   that 
  confirm 
  its 
  separation 
  from 
  Thiara, 
  sensa 
  stricto, 
  by 
  means 
  of 
  

   the 
  shell. 
  

  

  Genus 
  Tarehia 
  H. 
  and 
  A. 
  Adams, 
  1854 
  

  

  Genotype: 
  (Melania 
  semigranosa 
  von 
  dem 
  Busch 
  =) 
  Tarehia 
  semi- 
  

   granosa 
  (von 
  dem 
  Busch) 
  1842, 
  by 
  subsequent 
  designation 
  by 
  Morri- 
  

   son, 
  1952. 
  

  

  Reexamination 
  of 
  the 
  type 
  designation 
  of 
  this 
  genus 
  by 
  Brot 
  (1874, 
  

   p. 
  7) 
  shows 
  it 
  to 
  be 
  completely 
  inoperative. 
  His 
  statement 
  that 
  

   ^'granijera" 
  is 
  the 
  type 
  refers 
  to 
  Melania 
  granifera 
  von 
  dem 
  Busch, 
  

   the 
  only 
  such 
  specific 
  name 
  originally 
  included 
  by 
  H. 
  and 
  A. 
  Adams. 
  

   To 
  the 
  best 
  of 
  my 
  knowledge, 
  T. 
  granifera 
  H. 
  and 
  A. 
  Adams 
  is 
  still 
  a 
  

   nomen 
  nudum. 
  This 
  nomen 
  nudum 
  is 
  proven 
  not 
  to 
  be 
  the 
  same 
  

   as 
  Melania 
  granifera 
  of 
  Lamarck 
  by 
  H. 
  and 
  A. 
  Adams, 
  who 
  listed 
  

   Lamarck's 
  specific 
  name 
  separately 
  and 
  distinctly 
  as 
  a 
  member 
  of 
  

   the 
  genus 
  Plotia. 
  One 
  of 
  the 
  valid, 
  originally 
  included 
  species 
  was 
  

   designated 
  as 
  genotype 
  (Morrison, 
  1952, 
  p. 
  8) 
  in 
  order 
  to 
  correctly 
  

   and 
  legally 
  fix 
  Tarehia 
  upon 
  the 
  group 
  of 
  thiarid 
  snails 
  to 
  which 
  it 
  

   has 
  been 
  restricted 
  and 
  applied 
  since 
  the 
  time 
  of 
  Brot 
  (1874). 
  

  

  The 
  animals 
  of 
  T. 
  lateritia 
  (Lea) 
  from 
  China, 
  of 
  T. 
  granifera 
  

   (Lamarck) 
  from 
  the 
  Philippines, 
  and, 
  more 
  recently, 
  of 
  the 
  Tarehia 
  

   colony 
  accidentally 
  introduced 
  to 
  Lithia 
  Sulphur 
  Springs, 
  near 
  

   Tampa, 
  Fla., 
  have 
  been 
  examined 
  for 
  the 
  reproductive 
  characters 
  

   and 
  proven 
  thiarid. 
  

  

  