REPORT ON THE ALCYONARIA. xi 



Family I. H a i m e i D /E. 



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

 Haimcidx, v. Koch, Morphol. Jahrb., Bd. iv. p. 474. 

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



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

 with or without spicules. 



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



Danielssen, Nye Alcyonider, p. 15, Tab. 8. 



The polyps are cylindrical, minute, retractile. There is no trace of stolons or of a 

 sprea.ding 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 II. C o r n u l a r 1 1 d ^. 



CoiTiulariadse, Dana, Zoophytes, p. 627; Kolliker, Icones histiologicse, pt. ii. p. 131. 



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



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



Cornularinse, Klunzinger, Korall. des rotheu Meeres, i. p. 42. 



Cornularida, v. Koch. Skelet d. Alcyonarien, Morph, Jahrb., Bd. 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. Rhizoxenia may be regarded as 

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

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

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

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

 network of sap-canals. This development of a basal ccenenchymatous membrane leads 

 on to the conditions exhibited by the Xeniidae. 



