Family SCLEROGORGID^ Kolliker. 



Sclcrogorgiacece (Subfamily) Kolliker. Icones Histiologicae, II, 2, 1865, p. 142. 

 Suberogorgidce Studer. Versuch eines Systemes der Alcyonaria, 1887, p. 29. 

 Sclerogorgiadce Wright and Studer. Challenger Reports, the Alcyonaria, 1889, p. XXXIV. 

 Sclerogorgidce Bourne. A treatise on Zoology, Part II, Chapter VI, 1900, p. 25. 

 Sclerogorgidtz Nutting. Hawaiian Alcyonaria, 1908, p. 569. 



The original definition of this family is a follows : 



"Gorgoniden mit ungegliederter Axe, die aus Hornsubstanz und verschmolzenen Kalk- 

 korpern besteht. Ccenenchyma wie bei Gorgonia". 



STUDER (1887) amplifies this definition as the following translation shows: 



"A plainly separable axis and horny substance which surrounds the thickly aggregated 

 spicules. The axis is surrounded by water-vascular canals which communicate with the branched 

 network of ccenenchymal canals which connect the polyps. The polyps show a warty exserted 

 calyx into which the upper, tentacle-bearing part (of the polyp) can retract". 



WRIGHT and STCDER (1889) give practically the same definition as the above. 



The present writer would modify this definition so as to further emphasize the peculiar 

 characters of the axis, as follows : 



Scleraxonia with a well defined axis formed by an agglutinated mass of calcareous 

 spicules which have surfaces devoid of verrucae or of thorny points and are embodied in horny 

 sheaths which often form a mesh or network by cross connection and adhesions. 



This is a very well-defined family with only about a dozen known species. It is represented 

 in the Siboga collection by two genera and eight species, three of which are new. 



Synoptic view of the genera and species of SCLEROGORGID.E 

 collected by the Siboga Expedition. 



New species are indicated by an asterisk (*). 



Suberogorgia. Korceides. 



.V. verriculata (Esper), S. ornata Thomson 

 and Simpson, 5. kollikeri Studer, 5. rubra 

 Thomson and Henderson, S. *appressa, 

 S. *tliomsoni, S. *pulchra. 



K. koreni Wright and Studer. 



