﻿40 
  

  

  A 
  MONOGRAPH 
  OF 
  THE 
  VICTORIAN 
  SPONGES. 
  

  

  only 
  that 
  jmrt 
  of 
  each 
  system 
  which 
  deals 
  with 
  the 
  Calcarea 
  Homocoela 
  (Ascones), 
  of 
  

   which 
  the 
  following 
  is 
  an 
  epitome* 
  : 
  — 
  

  

  (a.) 
  Natural 
  System. 
  

  

  Family 
  Ascones. 
  

  

  Genus 
  1. 
  Ascetta. 
  — 
  Spicules 
  all 
  triradiate. 
  

  

  Genus 
  2. 
  Ascilla. 
  — 
  Spicules 
  all 
  quadriradiate. 
  

  

  Genus 
  3. 
  Ascyssa. 
  — 
  Spicules 
  all 
  oxeote. 
  

  

  Genus 
  4. 
  .4scrt///s.— 
  Spicules 
  partly 
  triradiate, 
  partly 
  quadriradiate. 
  

  

  Genus 
  5. 
  Ascortis. 
  — 
  Spicules 
  partly 
  triradiate, 
  partly 
  oxeote. 
  

  

  Genus 
  6. 
  Ascnlmis. 
  — 
  Spicules 
  partly 
  quadriradiate, 
  partly 
  oxeote. 
  

  

  Genus 
  7. 
  Ascandra. 
  — 
  Spicules 
  partly 
  triradiate, 
  partly 
  quadriradiate 
  and 
  

  

  partly 
  oxeote. 
  

  

  (b.) 
  Artificial 
  System. 
  

  

  Family 
  1. 
  Olynthida. 
  

  

  Ascones 
  consisting 
  of 
  a 
  single 
  person 
  with 
  a 
  single 
  osculum. 
  

  

  Genus 
  1. 
  Olynthus. 
  — 
  A 
  single 
  person 
  with 
  naked 
  osculum. 
  

  

  Genus 
  2. 
  OlyntheUa. 
  — 
  A 
  single 
  person 
  with 
  probosciform 
  osculum. 
  

  

  Genus 
  3. 
  Olynthium. 
  — 
  A 
  single 
  person 
  with 
  the 
  osculum 
  provided 
  with 
  a 
  

  

  fringe. 
  

  

  Family 
  2, 
  Clystolinthida. 
  

   Ascones 
  consisting 
  of 
  a 
  single 
  person 
  without 
  any 
  osculum. 
  

   Genus 
  4. 
  Clystolynthus. 
  — 
  A 
  single 
  person 
  without 
  an 
  osculum. 
  

  

  Family 
  3. 
  Soleniscida. 
  

  

  Ascones 
  consisting 
  of 
  a 
  colony 
  of 
  simple 
  persons 
  provided 
  with 
  

   oscula. 
  

  

  Genus 
  5. 
  Soleniscus. 
  — 
  A 
  colony 
  of 
  simple 
  persons 
  with 
  naked 
  oscula. 
  

   Genus 
  6. 
  Solenula. 
  — 
  A 
  colony 
  of 
  simple 
  persons 
  with 
  probosciform 
  oscula. 
  

   Genus 
  7. 
  Solenidium. 
  — 
  A 
  colony 
  of 
  simple 
  persons 
  with 
  fringed 
  oscula. 
  

  

  " 
  Die 
  Kalkschwamme," 
  Vol. 
  I., 
  pp. 
  84, 
  85. 
  

  

  