THE GORGONACEA OF THE SIBOGA EXPEDITION 



IV. THE PLEXAURIDyE 



BY 



C. C. NUTTING, 



Professor of Zoology, State L'nivevsity of Iowa. 



With 4 plates. 



(Aided by a grant from the elizabeth thompson science fund.) 



Family Plexaurid.e Gray. 



Plexaura Lamouroux. Exposition Méthodique, 182 1, p. 35. 



Plexauridcc Gray. Annals and Magazine of Natural History, Series 3, Vol. IV, 1859. 



Eunicea -\- Plexaura Milne Edwards et Haime. Histoire naturelle des Coralliaires, 1857, Vol. I, 



pp. 146, 152. 

 Euniceidtc Kólliker. Icones Histologie^, II, 1865, p. 137. 



Plexauridcc Verrill. Transactions Connecticut Academy of Science, Vol. I, 1869, p. 135. 

 Euniceidcc Ridley. Annals and Magazine of Natural History, Series 5, Vol. n, 1883, p. 253. 

 Plexauridcc Wright and Studer. Challenger Reports, the Alcyonaria, 18S9, p. 135. 

 Plexauridcc Studer. Alcyonarien aus der Sammlung des Naturhistorischen Museums in Lübeck, 



1894, p. iii. 

 Plexauridcc Brundin. Bihang til Svenska Vet.-Akad. Handlingar, Band 22, Afd., 17, N° 3, 



1896, p. 17. 

 Plexauridcc Thomson and Henderson. Ceylon Pearl Oyster Report, Alcyonaria, 1905, p. 304. 



The original definition of the family, as given by Gray, is as follows: 

 "Bark granular, persistent, cork-like, without any important grooves. Cells placed equally 

 on all sides of the branches". 



S1BOGA-EXPEDITIE XIII i'. I 



7 



