COBALLIARIA. ' 



Synojjsis of Orders. 

 I. Tentacles 8 (^very rarely 6), pinnate, with tubercles on each side. 



1. ZOOPHYTARIA. 



II. Tentacles 6 or 12, simple, coniail. 



2. ANTIPATHARIA. 



III. Tentacles 20 or more. 



3. HYALOCHiETAIlIA. Poljpcs social, forming a bark, supported 



by an axis formed of elongated siliceous spicules. 



4. ZOANTHARIA. Polypes social, covered with a hard often 



granular skin, covering some marine bodies, without an axis. 



5. ACTINAEIA. Polypes separate or social, covered with a soft 



skin, rarely secreting a horny tubular sheath at the base. 



6. MADREPORARIA. Polypes social ; the integument, becoming 



solidified by the deposit of calcareous matter, forming a true 

 coral. 



The following papers, among others, refer to the specimens of this 

 Class in the British Museum : — 



Gray, J. E. Animal of Antipathes, P. Z. S. 1832, p. 41. 



. New genus of Corals (Mdalia), P. Z. S. 1835, p. 59 ; Weigm. Arch. 



1836, ii. p. 195. 

 . On the Coral known as the Glass Plant (Hyalonema), P. Z. S. 1835, 



p. 63. 

 . Sarcojytilm, a new genus of Pennatulidae, P. Z. S. 1848, p. 45 ; Ann. 



& Mag. Nat. Hist. 1849, p. 76. 

 . New species of Gorcfonia from Australia, P. Z. S. 1849, p. 146; 



Ann. & Mag. Nat. Hist. 1850, p. 510 ; Proc. Koy. Soc. 1852, ii. 



p. 193. 



New genus of Gorgoniadse, P. Z. S. 1851, p. 124. 



On the Animal and Bark oi Antipathes, P. Z. S. 1857, p. 113 ; Ann. 

 & Mag. Nat. Hist. 1857, xx. p. 460. 



New genus of Gorgoniadse (Acantho(/orffia), P. Z. S. 1857, pp. 128, 

 158; Ann. & Mag. Nat. Hist. 1857, xx. 461. 



Synopsis of the families and genera of Axiferous Zoophytes or 

 Barked Corals, P. Z. S. 1857, p. 278. 



Description of some new genera of Lithophytes or Stony Corals, 

 P. Z. S. 1859, p. 479. 



Description of CoraUiiwi Johnsoni from Madeira, P. Z. S. 1800, 

 p. 393. 



^irrangement of Zoophytes with pinnated tentacks, Ann. & Mag. 

 Nat. Hist. 1859, iv. p. 439. 



