﻿On 
  a 
  new 
  British 
  Species 
  o/Microciona, 
  Bk. 
  99 
  

  

  Fig. 
  3. 
  Petrosia 
  testudinaria, 
  from 
  the 
  Straits 
  of 
  Malacca. 
  Registered 
  

   83. 
  11. 
  8. 
  28 
  in 
  the 
  British 
  Museum 
  collection. 
  

  

  [All 
  three 
  figures 
  are 
  from 
  photographs 
  taken 
  by 
  Mr. 
  Gepp 
  from 
  

   specimens 
  in 
  the 
  British 
  Museum, 
  and 
  they 
  are 
  all 
  very 
  much 
  reduced.] 
  

  

  Plate 
  IV. 
  

  

  Fig. 
  4. 
  Spicules 
  of 
  Rhaphidophlus 
  spiculasus 
  (drawn 
  under 
  Zeiss 
  E, 
  Ocular 
  

   2, 
  Camera), 
  a, 
  b, 
  c, 
  large 
  tylostylote 
  ; 
  d, 
  e, 
  small 
  spined 
  tylo- 
  

   stylote. 
  

  

  Fig. 
  5. 
  Spicules 
  of 
  Hymeniacidon 
  ? 
  fatida 
  (drawn 
  under 
  Zeiss 
  C, 
  Ocular 
  

   2, 
  Camera), 
  a, 
  small 
  stylote 
  ; 
  b, 
  large 
  oxeote. 
  

  

  Fig. 
  6. 
  Spicules 
  of 
  Acanthella 
  Carteri 
  (drawn 
  under 
  Zeiss 
  C, 
  Ocular 
  2, 
  

   Camera), 
  a, 
  oxeote 
  ; 
  b, 
  c, 
  e, 
  stylote 
  ; 
  d, 
  strongylote. 
  

  

  Fig. 
  7. 
  Spicules 
  of 
  GeJliodes 
  carnosa 
  (drawn 
  under 
  Zeiss 
  E, 
  Ocidar 
  2, 
  

   Camera). 
  «, 
  b, 
  oxeote 
  ; 
  c, 
  sigmata. 
  

  

  Fig. 
  8. 
  Spicules 
  of 
  Clathria 
  corallitineta 
  (drawn 
  under 
  Zeiss 
  E, 
  Ocular 
  2, 
  

   Camera), 
  a, 
  b, 
  c, 
  stylote 
  ; 
  d, 
  spined 
  tylostylote. 
  

  

  Fig. 
  9. 
  Spicules 
  of 
  Reniera 
  madrepora 
  (drawn 
  under 
  Zeiss 
  C, 
  Ocular 
  2, 
  

   Camera), 
  a, 
  b, 
  c, 
  oxeote; 
  d, 
  stylote 
  (abnormal). 
  

  

  Fig. 
  10. 
  Spicules 
  of 
  Clathria 
  indica 
  (drawn 
  under 
  Zeiss 
  E, 
  Ocular 
  2, 
  

   Camera). 
  a, 
  b, 
  tylostylote, 
  verging 
  upon 
  unequal-ended 
  

   oxeote 
  ; 
  c, 
  spined 
  stylote. 
  

  

  Plate 
  V. 
  

  

  Fig. 
  11. 
  Axinella 
  tubulata, 
  section 
  taken 
  at 
  right 
  angles 
  to 
  the 
  surface, 
  

  

  showing 
  tubes 
  of 
  the 
  commensal 
  Annelid, 
  a, 
  tube 
  with 
  worm 
  

  

  in 
  it 
  ; 
  b, 
  c, 
  empty 
  tubes. 
  

   Fig. 
  12. 
  Spicules 
  of 
  Axinella 
  labyrinthica 
  (drawn 
  uuder 
  Zeiss 
  C, 
  Ocular 
  2, 
  

  

  Camera), 
  a, 
  strongylote 
  ; 
  b, 
  c, 
  stylote. 
  

   Fig. 
  13. 
  Spicides 
  of 
  Auletta 
  aurantiaca 
  (drawn 
  under 
  Zeiss 
  C, 
  Ocular 
  2, 
  

  

  Camera), 
  a, 
  b, 
  d, 
  stylote 
  ; 
  c, 
  e, 
  oxeote. 
  

  

  X. 
  — 
  On 
  a 
  new 
  British 
  Species 
  of 
  Microdot! 
  a, 
  Bk., 
  in 
  which 
  

   the 
  ends 
  of 
  the 
  Tricurvate 
  are 
  Spiniferous 
  &c. 
  By 
  H. 
  J. 
  

   Carter, 
  F.R.S. 
  &c, 
  and 
  R. 
  Hope, 
  F.Z.S. 
  

  

  [Plate 
  VI.] 
  

  

  § 
  1. 
  By 
  Mr. 
  Carter. 
  

  

  This 
  species 
  was 
  conjectuvally 
  referred 
  by 
  me 
  to 
  Microciona 
  

   armata, 
  Bk. 
  ( 
  c 
  Annals,' 
  1874, 
  vol. 
  xiv. 
  pp. 
  456, 
  457), 
  on 
  the 
  

   supposition 
  that 
  the 
  spiniferous 
  character 
  of 
  the 
  ends 
  of 
  the 
  

   tricurvate 
  spicules 
  had 
  been 
  overlooked 
  by 
  Bowerbank. 
  I 
  now 
  

   find 
  1 
  was 
  mistaken, 
  on 
  which 
  account 
  it 
  has 
  probably 
  hitherto 
  

   failed 
  to 
  be 
  considered 
  a 
  distinct 
  species, 
  and 
  therefore 
  has 
  been 
  

  

  