REPORT ON THE ALCYONARIA. xi 



Family I. H a i m e i D M. 



Hainmdx = Ilaimeinx, Perc. Wright, Quart. Journ. Micr. Sci., vol. v. pp. 213-217, 1865. 

 Haimeidx, v. Koch, Morpho]. .Jahrb., Bd. iv. p. 474. 

 Monoxenidx, Haeckel, Arab. Korallen., p. 8, 1876. 



In this family the polyps remain single, not vmiting to form colonies ; the polyp walls 

 with or without spicules. 



1. Haimea, Milne-Edwards, Hist. Nat. des Coralliaires, t. i. p. 104; Korcn and 



Danielssen, Nye Alcyonidcr, p. 15, Tal). 8. 



The polj^ps are cylindrical, minute, retractile. There is no trace of stolons or of a 

 spreading base. Spicules very thorny spindles, clubs and crosses. Nematocysts ovoid. 



2. Hartea, Perceval Wright, Quart. Journ. Micr. Sci., vol. v. pp. 213-217, 1865. 

 Polyps elongated, retractile. Spicules spiny spindles. 



3. Monoxenia, Haeckel, Arab. Korallen., p. 8. 

 The polyps without spicules. 



Family H. C o R N u L A r 1 1 d /E. 



Comulariadx, Dana, Zoophytes, p. 627; Kblliker, Icones histiologica;, pt. ii. p. 131. 



Qomvlarinx and Telestinx, Milne-Edwards, Hist. Nat. des Coralliaires, t. i. p. 104. 



Cornidaridse, Verrill, Proc. Essex Inst., vol. iv. p. 148. 



Gor7iHlarinx, Klunzinger, Korall. des rothen Jlecres, i. p. 42. 



Cornularida, v. Koch. Skelet d. Alcyonarien, Morph. Jahrb., Ld. iv. p. 474. 



According to Klunzinger's diagnosis, the polyps are not united in bundles at the base 

 to a stem or foot, but have cuticle-like or stolon-like expansions, or are branched and 

 bear lateral buds. 



The Cornulariidse are a family of great interest, forming as it were a starting-point from 

 which several families, or even orders, appear to diverge. lihizoxenia may be regarded as 

 one of the simplest colonial forms, allied to the simple polyp forms met with in Haimeida?. 

 From this Anthelia appears to diverge in one direction, where the polyjas do not yet 

 exhibit a stiffened calycine portion distinct from a retractile oral region, but have their bases 

 surrounded by a thickened ccenenchyma penetrated by large nutritive canals, and by a 

 network of sap-canals. This development of a basal coenench}Tnatous membrane lead.'^ 

 on to the conditions exhibited by the Xeniidae. 



