Synoptic vie» of th<- genera and species ol G .Mimi 



collected by the Siboga Expedion. 



Gorgonella Scirpearella. 



'urn, *delicatula y s "'< / "-<'. gracilis, regia, "hemispherica. 



I Nicella. 



Verrucella. -^ *coralloides y *carinata. 



/'. rubra, new nar tellata. Ellisella. 



]■:. *flava. 



Ctenocella. 



Plumigorgia (new genus). 



C. peciinata. n „,, , ., 



' J . hyaroiaes. 



Juncella. 

 'uncea, gemmacea, racemosa^ *sanguinea. 



Isidoides (new -cnus). 

 /. armata. 



The table shows that the Siboga Expedition secured 21 species of Gorgonellida- 11 of 

 which are new; and that these species were divided among o genera, 2 of which are new. 



Systematic description of genera and species. 

 Genus Gorgonella Valenciennes (modified). 



Gorgonella Valenciennes. Comptes-rendus, tome XLI. 1855, p. 14. 



rgonella Milne Edwards et Haime. Histoire Naturelle des Coralliaires, \'ol. I, 1857, p. 1S3. 



rgonella Kölliker. Icones Histiologica:, II. 1S65, p. 139. 



rgonella Studer. Monatsbericht der Königl. Akademie der Wissenschaften zu Berlin, 187S, 

 p. 661. 

 Gorgonella Studer. Versuch eines Systemes der Alcyonaria, 1887, p. 68. 

 Gorgonella Wright and Studer. Challenger Reports, the Alcyonaria, 1889, p. i.xvi. 

 Gorgonella (Val. emended), I' I Hérouard. rraité de Zoölogie concrete, II, 2, 190 1, p. 428. 



Gorgonella Hickson. Alcyonaria of the Maldives, [9051 j>. 817. 



The original discription of this genus is as follows: 

 "Le sclerobase ramifie en fines branches rameuses et très-divisées". 

 Milne Edwards and Haime (1857) define the genus as follows: 



"Colony much branched, ccenenchyma very thin; calyces included or but little exserted". 

 inslatioi 



Kölli J65) appears to have heen tin- first to make a critica! study of the spicules 



of this genus, llis definition, freely translated, is as follows: 



-\.\is commonly without layers, radiately striated. Calyces when evident, low warts. 



Spicules of tin: ccenenchyma warty doublé spheres and doublé spindles. .07 to .1 mm. in length 

 are spindles . 1 3 mm. long. 



