POLYPS AND CORALS. 19 



genera more recently referred to other classes, and espe- 

 cially the Tabulate corals, which were included by Milne 

 Edwards and Haime, but which, according to the observa- 

 tions of Prof. Agassiz, who has seen the Polyps of Mille- 

 pora\ belong among the Hydroidea. This genus, however, 

 was not united with the group of Zoanthaires by Blainville, 

 but with the Bnjozoa or Polypoid MoUusks. 



Exclusive of the exceptional genera, this order corres- 

 ponds to the great genus Madrepora of Linnseus, Pallas, El- 

 lis, Esper and other writers of the last century ; to the sec- 

 tion Polypiers lamelliferes of Lamarck^ and Lamoroux%° 

 to the group of Zoanthaires pierreux of Blainville ''j to part 

 of the suborder Actinaria of Dana'^, Agassiz « and others; 

 and to the third suborder of Zoanthairia, named Madrepo- 

 RARiA, in the works, of Milne Edwards and Haime^. The 

 latter arrangement I have adopted in a former paperl 



This order has been sufficiently characterized for my 

 present purpose in the Synopsis of the Classification^ as 

 well as its subdivisions and principal families. 



SUBOEDER, MADREPOMOEA Dana, pars. 



Family, Madreporid^ Dana. 



Madrepora turgida Verrill, nov. sp. 



The corallum consists of a cluster of thick, irregular 

 branches arismg from a large massive base. The branches 

 are short and turgid, rounded a nd elevated at the ends, or 



1 Contributions to the Nat. Hist. U. S., Vol. III., page 61. 



2 Histoire des Animaux sans vert^bres, t. II., 1816. 



3 Exposition methodique, 1821. 



4Dictionnaire des Sci. naturelles, 1830, and Manual d' actinol., 1834. 



5 Zoophytes of the U. S. Expl. Exp., 1846. 



6 Contributions to the Natural Hist, of the U. S. Vol. I, p. 151, 1857 

 Vol. III., p. 60, 1860. The Group Actinana of Dana is here' considered an 

 order parallel with Alcyonaria. 



7 Histoire Naturelle des Coralliaires, Vol. II, p. 4, 1857. 



8 Revision of the Polyps of the East Coast, U. S. in Memoires Boston 

 boc. Natural History, Vol. I, page 14, 1864. 



9 These Proceedings, Vol. IV, p. 145, 1865. 



