﻿42 
  PROCEEDINGS 
  OF 
  THE 
  MALACOLOGICAL 
  SOCIETr. 
  

  

  Diain. 
  maj. 
  15-5, 
  min. 
  13'5inm.; 
  alt. 
  9J 
  mm. 
  

  

  Ilab. 
  — 
  Cape 
  Bovda, 
  Kangaroo 
  Island, 
  Suiith 
  Australia. 
  

  

  Type 
  in 
  Mr. 
  Leinan's 
  collection. 
  

  

  The 
  nearest 
  ally 
  of 
  this 
  new 
  species 
  is 
  A. 
  oligopleura, 
  Tate, 
  but 
  the 
  

   latter 
  is 
  much 
  more 
  depressed 
  in 
  the 
  spire, 
  the 
  whorls 
  are 
  less 
  

   compressed, 
  and 
  the 
  last 
  whorl 
  is 
  less 
  angular 
  at 
  the 
  periphery, 
  while 
  

   in 
  the 
  new 
  species 
  the 
  last 
  whorl 
  is 
  not 
  angulated 
  around 
  tlie 
  

   umbilicus, 
  the 
  costoe 
  are 
  more 
  distant 
  and 
  regular, 
  the 
  aperture 
  is 
  

   more 
  rounded 
  and 
  the 
  margins 
  more 
  approaching. 
  It 
  is 
  also 
  allied 
  

   to 
  A. 
  phillipsiana, 
  Angas, 
  but 
  that 
  form 
  has 
  a 
  wider 
  umbilicus, 
  the 
  

   aperture 
  is 
  less 
  rotundate, 
  the 
  last 
  whorl 
  descends 
  more, 
  the 
  peristome 
  

   is 
  almost 
  continuous, 
  while 
  the 
  costee 
  are 
  much 
  less 
  prominent. 
  Yet 
  

   another 
  but 
  more 
  distant 
  ally 
  is 
  A. 
  arcigerens, 
  Tate, 
  which, 
  however, 
  

   is 
  still 
  more 
  depressed, 
  and 
  has 
  the 
  whorls 
  flattened 
  above, 
  with 
  

   i\ 
  shallow 
  suture, 
  while 
  the 
  costae 
  are 
  still 
  more 
  distant, 
  as 
  well 
  as 
  

   more 
  elevated, 
  and 
  compressed. 
  I 
  have 
  much 
  pleasure 
  in 
  associating 
  

   with 
  this 
  new 
  species 
  the 
  name 
  of 
  the 
  owner 
  of 
  the 
  type. 
  

  

  Angasella 
  hinsbyi, 
  n.sp. 
  

  

  Shell 
  narrowly 
  umbilicated, 
  subglobular, 
  brown, 
  rather 
  thin, 
  the 
  

   nepionic 
  whorls 
  finely 
  granulated, 
  the 
  next 
  earlier 
  whorls 
  j)licate- 
  

   stz'iate, 
  the 
  later 
  ones 
  — 
  about 
  1| 
  — 
  gradually 
  becoming 
  finely 
  plicate- 
  

   costate, 
  the 
  costse 
  being 
  rather 
  crowded 
  and 
  irregular, 
  some 
  more 
  or 
  

   less 
  anastomosing. 
  Spire 
  convex, 
  apex 
  somewhat 
  sunken, 
  suture 
  

   rather 
  deep. 
  Whorls 
  4j, 
  rather 
  elevated, 
  rounded 
  above, 
  slightly 
  

   flattened 
  below, 
  at 
  first 
  subangulated 
  at 
  the 
  periphery, 
  tumid 
  and 
  

   dilated 
  at 
  the 
  aperture, 
  and 
  subconstricted 
  below 
  behind 
  the 
  peri- 
  

   stome, 
  very 
  shortly 
  and 
  slightly 
  descending 
  in 
  front. 
  Aperture 
  

   oblique, 
  ovate-rotundate 
  ; 
  margins 
  approaching, 
  united 
  by 
  a 
  thin 
  

   callus; 
  upper 
  margin 
  arcuate, 
  outer 
  and 
  lower 
  margins 
  regularly 
  

   curved, 
  columellar 
  margin 
  broadly 
  dilated 
  and 
  ascending, 
  slightly 
  

   overhanging 
  the 
  deep 
  and 
  rather 
  narrow 
  umbilicus. 
  

  

  Diatn. 
  maj. 
  17, 
  min. 
  14 
  mm. 
  ; 
  alt. 
  12 
  mm. 
  

  

  Uab. 
  — 
  Mitchell 
  District, 
  Silvertown, 
  New 
  South 
  Wales. 
  

  

  Type 
  in 
  \\\y 
  collection. 
  

  

  Quite 
  a 
  distinct 
  form, 
  differing 
  from 
  all 
  the 
  other 
  species 
  of 
  Angasella, 
  

   especially 
  in 
  its 
  dark 
  colour 
  and 
  the 
  tumid 
  whorls. 
  Mr. 
  Ponsonby 
  

   possesses 
  a 
  specimen 
  which 
  measures 
  19 
  o 
  X 
  16 
  25 
  X 
  12'5 
  mm., 
  while 
  

   Mr. 
  Leman 
  has 
  three 
  specimens 
  froni 
  the 
  Beddome 
  Collection, 
  one 
  of 
  

   which 
  is 
  a 
  little 
  more 
  depressed 
  in 
  the 
  spire, 
  measuring 
  lG-5 
  X 
  13'5 
  

   X 
  10-25 
  mm. 
  

  

  