﻿482 
  COLLECTION 
  a 
  from 
  MELANESIA. 
  

  

  be 
  mentioned 
  appear 
  to 
  have 
  occurred 
  in 
  the 
  Australian 
  collections 
  

   of 
  the 
  ' 
  Challenger,' 
  the 
  Eeport 
  on 
  which 
  unfortunately 
  only 
  appeared 
  

   while 
  this 
  Report 
  was 
  passing 
  through 
  the 
  press. 
  

  

  108. 
  Leucetta 
  primigenia, 
  Ildclel, 
  var. 
  microrrhaphis, 
  id. 
  

  

  KalkscMciimme, 
  ii. 
  p. 
  118, 
  pi, 
  xxi. 
  

  

  A 
  small 
  bean-shaped 
  specimen, 
  of 
  the 
  Lipostomella 
  form. 
  

  

  Hah. 
  Alert 
  Island, 
  Torres 
  Straits, 
  7 
  fms. 
  

  

  Bistrihution 
  (the 
  species). 
  Mediterranean, 
  Atlantic, 
  Cape 
  of 
  Good 
  

   Hope, 
  Eed 
  Sea, 
  Indian 
  Ocean, 
  South 
  Australia, 
  Fiji 
  Islands, 
  Chili 
  

   {H'dckel) 
  ; 
  Kerguelen 
  and 
  Heard 
  Islands 
  {PoJejaeff). 
  

  

  109. 
  Leucaltis 
  bathybia, 
  Hddel, 
  var. 
  australiensis, 
  nov. 
  

   (Plate 
  XLIII. 
  fig. 
  m.) 
  

  

  Leucaltis 
  bathybia, 
  Hdckel, 
  Kalksclncdmme, 
  ii. 
  p. 
  156, 
  pi. 
  xxviii. 
  

  

  fig. 
  2. 
  

  

  A 
  small, 
  low, 
  massive 
  specimen, 
  with 
  a 
  small 
  lateral 
  unarmed 
  vent 
  

   and 
  very 
  reduced 
  cloacal 
  cavity. 
  The 
  quadriradiates 
  are 
  sagittal, 
  

   those 
  of 
  the 
  outer 
  surface 
  very 
  large 
  ; 
  diameter 
  of 
  rays 
  about 
  

   •04 
  millim., 
  the 
  facial 
  angle 
  nearly 
  1S0°, 
  the 
  apical 
  ray 
  in 
  the 
  same 
  

   plane 
  as 
  the 
  laterals; 
  the 
  deep 
  quadriradiates 
  have 
  a 
  somewhat 
  

   smaller 
  facial 
  angle 
  and 
  more 
  slender 
  rays, 
  and 
  the 
  apical 
  ray 
  oiten 
  

   projects 
  well 
  forward 
  ; 
  rays 
  almost 
  straight. 
  The 
  triradiates 
  form 
  

   a 
  thin 
  layer 
  on 
  the 
  inner 
  wall, 
  where 
  their 
  rays 
  measure 
  only 
  

   about 
  "01 
  millim. 
  in 
  diameter 
  ; 
  they 
  have 
  a 
  facial 
  angle 
  of 
  about 
  

   160° 
  ; 
  in 
  the 
  deep 
  parts 
  they 
  are 
  subregular, 
  sparsely 
  scattered 
  

   amongst 
  the 
  quadriradiates, 
  and 
  the 
  rays 
  measure 
  about 
  -02 
  (some- 
  

   times 
  -025) 
  millim. 
  in 
  diameter; 
  rays 
  approximately 
  straight. 
  

   Colour 
  (in 
  spirit) 
  white. 
  

  

  This 
  form 
  differs 
  from 
  vars. 
  perimina 
  and 
  arahica 
  of 
  Hackel 
  (Z. 
  c.) 
  

   in 
  the 
  massive 
  shape 
  of 
  the 
  sponge, 
  and 
  in 
  the 
  larger 
  size, 
  as 
  com- 
  

   pared 
  with 
  the 
  quadriradiates, 
  of 
  the 
  deep 
  triradiates. 
  In 
  the 
  com- 
  

   parative 
  straightness 
  of 
  the 
  rays 
  it 
  agrees 
  with 
  var. 
  arahica 
  and 
  

   var. 
  mascarenka, 
  mihi 
  (see 
  this 
  Eeport, 
  "Western 
  Indian 
  Ocean 
  

   district) 
  ; 
  but 
  differs 
  from 
  the 
  latter 
  in 
  the 
  smaller 
  diameter 
  of 
  the 
  

   rays 
  of 
  the 
  large 
  cpiadriradiates, 
  in 
  the 
  apparent 
  smoothness 
  of 
  the 
  

   cloacal 
  surface, 
  and 
  the 
  massive 
  form. 
  

  

  Hah. 
  Port 
  Jackson. 
  

  

  Bistrihution 
  of 
  species. 
  Red 
  Sea 
  (HdcJcel). 
  

  

  110. 
  Leuconia 
  saccharata, 
  Hddel. 
  

  

  Leucandra 
  saccbarata, 
  Ilachel, 
  Kalkschuiimme, 
  ii. 
  p. 
  228, 
  pi. 
  xxxiii. 
  

   fig. 
  3, 
  pi. 
  xxxviii. 
  figs. 
  7-14. 
  

  

  A 
  fine 
  specimen, 
  GO 
  millim. 
  across, 
  of 
  the 
  Amplioriscus 
  type, 
  and 
  

   fragments. 
  One 
  cloacal 
  fistula 
  measures 
  upwards 
  of 
  30 
  millim. 
  in 
  

   length. 
  

  

  Hah. 
  Port 
  Jackson, 
  0-5 
  fms. 
  

  

  Bistrihution. 
  Bass 
  Straits 
  (Hdckel). 
  

  

  