﻿384 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  103 
  

  

  Explanation 
  of 
  Plate 
  11 
  

  

  1, 
  Melanopsis 
  dufourii 
  (Ferussac), 
  female, 
  from 
  the 
  right 
  side 
  showing 
  egg-laying 
  groove 
  

  

  and 
  the 
  "ovipositor" 
  in 
  pit 
  on 
  right 
  side 
  of 
  foot, 
  from 
  Elche, 
  Alicante 
  Province, 
  Spain 
  

   (USNM 
  515845). 
  

  

  2, 
  Oxytrema 
  canaliculatum 
  undulatum 
  (Say), 
  female, 
  showing 
  egg-laying 
  groove 
  and 
  pit 
  in 
  

  

  right 
  side 
  of 
  foot, 
  from 
  Kentucky 
  River, 
  Clifton, 
  Ky. 
  (USNM 
  597434). 
  

  

  3, 
  Oxytrema 
  nodifila 
  (Martens), 
  female, 
  as 
  in 
  fig. 
  2, 
  from 
  Han 
  River, 
  Kwang-jang-in, 
  Korea 
  

  

  (USNM 
  597451). 
  

  

  4, 
  PleuTocera 
  zonalis 
  (Rafinesque) 
  {=Melania 
  obovata 
  Say), 
  female, 
  as 
  in 
  fig. 
  2, 
  from 
  

  

  Kentucky 
  River, 
  Clifton, 
  Ky. 
  (USNM 
  595969). 
  

  

  5, 
  Oxytrema 
  bulbosa 
  (Gould), 
  female, 
  as 
  in 
  fig. 
  2, 
  from 
  tributary 
  of 
  John 
  Day 
  River, 
  10 
  

  

  miles 
  east 
  of 
  Austin, 
  Grant 
  County, 
  Oreg. 
  (USNM 
  473801). 
  

  

  6, 
  Paludomus 
  labiosus 
  (Benson) 
  (?), 
  female, 
  as 
  in 
  fig. 
  2, 
  from 
  roadside 
  run 
  north 
  of 
  Lampang, 
  

  

  Thailand 
  (USNM 
  361267). 
  

  

  7, 
  Oxytrema 
  deshayesiana 
  (Lea), 
  female, 
  as 
  in 
  fig. 
  2, 
  from 
  Tennessee 
  River, 
  near 
  Florence, 
  

  

  Ala. 
  (USNM 
  601564). 
  

  

  8, 
  Planaxis 
  sulcatus 
  (Born), 
  ovoviviparous 
  and 
  parthenogenetic 
  female 
  showing 
  egg-transfer 
  

  

  groove 
  and 
  brood-pouch 
  pore 
  ("birth 
  pore") 
  on 
  side 
  of 
  neck, 
  and 
  subhaemocoelic 
  

   brood 
  pouch 
  in 
  back 
  of 
  head 
  and 
  neck, 
  from 
  Romurrikku 
  Island, 
  Bikini 
  Atoll, 
  Marshall 
  

   Islands 
  (USNM 
  585106). 
  

  

  9, 
  Thiara 
  sp., 
  female, 
  showing 
  brood-pouch 
  pore 
  and 
  numerous 
  young 
  in 
  the 
  subhaemocoelic 
  

  

  brood 
  pouch, 
  from 
  Mindanao, 
  Philippines 
  (USNM 
  434144). 
  

  

  10, 
  Brotia 
  baccata 
  (Gould), 
  female, 
  showing 
  deep 
  egg-transfer 
  groove 
  on 
  right 
  side 
  and 
  

   subhaemocoelic 
  brood 
  pouch 
  with 
  hundreds 
  of 
  relatively 
  small 
  young, 
  from 
  Salween 
  

   River, 
  Ban 
  Mae 
  Hick, 
  Burma 
  (USNM 
  420467). 
  

  

  11, 
  Thiara 
  sp., 
  female, 
  as 
  in 
  fig. 
  9, 
  showing 
  the 
  anus, 
  oviduct 
  opening, 
  and 
  brood-pouch 
  

   pore 
  relations, 
  from 
  Naga, 
  Okinawa, 
  Ryukyu 
  Islands 
  (USNM 
  601311). 
  

  

  12, 
  Melanoides 
  sp., 
  female, 
  as 
  in 
  fig. 
  9, 
  with 
  unplgmented 
  shallow 
  "groove," 
  and 
  numerous, 
  

  

  equal-sized, 
  small 
  young, 
  from 
  Palo, 
  Leyte, 
  Philippines 
  (USNM 
  573572). 
  

  

  13, 
  Tarebia 
  lateritia 
  (Lea), 
  female, 
  as 
  In 
  fig. 
  9, 
  with 
  numerous 
  small 
  young, 
  from 
  Camlnlwit 
  

   Point, 
  MIndoro, 
  Philippines 
  (USNM 
  487583). 
  

  

  14, 
  Melanoides 
  turriculus 
  (Lea), 
  female, 
  as 
  in 
  fig. 
  9, 
  with 
  numerous 
  very 
  small 
  young 
  in 
  

  

  pouch, 
  from 
  Camlnlwit 
  Point, 
  MIndoro, 
  Philippines 
  (USNM 
  487582). 
  

  

  15, 
  Melanoides 
  sp., 
  female, 
  as 
  In 
  fig. 
  9, 
  with 
  a 
  very 
  few 
  proportionately 
  enormous 
  young 
  

  

  developed 
  in 
  the 
  subhaemocoelic 
  brood 
  pouch, 
  from 
  Manganyama, 
  Rota, 
  Marianas 
  

   Islands 
  (USNM 
  593472). 
  

  

  16, 
  Pachychilus 
  {Pilsbrychilus) 
  dalli 
  Pilsbry, 
  old 
  individual 
  showing 
  3 
  consecutive 
  peri- 
  

   stomes 
  to 
  prove 
  continuity' 
  of 
  sinuous 
  lip 
  character 
  of 
  adults, 
  from 
  Tehuantepec, 
  

   Mexico 
  (USNM 
  133197). 
  

  

  17, 
  Thiara 
  (Setaeara) 
  cancellata 
  Roding, 
  fresh 
  shell 
  showing 
  epidermal 
  spines, 
  from 
  Siaton, 
  

   Negros 
  Oriental, 
  Philippines 
  (USNM 
  597436). 
  

  

  18, 
  Fijidoma 
  maculala 
  (Mousson) 
  ( 
  = 
  holotype 
  of 
  laddi 
  Morrison) 
  from 
  Viti 
  Levu, 
  Fiji 
  

   Islands 
  (USNM 
  597433). 
  

  

  19, 
  Cubaedomus 
  brevis 
  (Orbigny), 
  ovoviviparous 
  and 
  parthenogenetic 
  female 
  (sketched 
  from 
  

  

  dried 
  material), 
  showing^only 
  2 
  embryonic 
  young 
  of 
  relatively 
  enormous 
  size 
  in 
  

   subhaemocoelic 
  brood 
  pouch,*^from 
  Rio 
  los 
  Cayos, 
  Bahia 
  Honda, 
  Pinar 
  del 
  Rio, 
  Cuba 
  

   (USNM 
  407991). 
  

   (Animal 
  sketches 
  not 
  drawn 
  to 
  scale; 
  figs. 
  16, 
  17 
  slightly 
  reduced; 
  fig. 
  18 
  enlarged 
  approxi- 
  

   mately 
  2 
  times.) 
  

  

  