INTRODUCTION. 
This Report contains a description of a rich collection of Alcyonacea made in the Far 
East by the Siboga Expedition, and entrusted to us by Professor Max Weber. It includes besides 
Alcyonacea a few representatives of the orders Stolonifera and Telestacea, and incidentally, a 
few representatives of the Gorgonacea — an order which had been previously dealt with by 
Professor Nutting. 
The numerical proportions of the forms dealt with will be seen from the following table. 
Under the heading New Species are included those new species of the Siboga Expedition which 
have been given a preliminary description by Sherriffs, Chalmers and Dean 1 ). 
ORDER 
GENERA 
NEW GENERA 
SPECIES 
NEW SPECIES 
Order I. Stolonifera: 
Genera 6 
New Genera 0 
Species 14 
New Species 5 
Order II. Alcyonacea: 
Genera 26 
New Genera 2 
Species 169 
New Species 50 
Order III. Gorgonacea: 
(incidental) 
Genera 30 
New Genera 0 
Species 49 
New Species 3 
Order IV. Telestacea: 
Genera 3 
New Genera 0 
Species 8 
New Species 2 
(The order Pennatulacea was dealt with by Hickson in magistral fashion.) 
SOME OUTSTANDING FEATURES OF THE COLLECTION. 
Attention may be called to some outstanding features. 
(1) Of interest in its primitiveness is Anthelia simplex n. sp. 
(2) While the authority of Hickson himself is rather against our verdict, we adhere to 
the view that Hicksonia should be kept separate from Clavularia. It is remarkable in its cross 
bridges between adjacent polyps. The genus is represented in the collection by Hicksonia viridis 
(Ouoy et Gaimard) and H. kollikeri Dean. 
1) We have been indebted to Professor W. Rae Sherriffs, D. Sc., for a first survey of the genus Dendronephthya (and a number 
of new species must bear his name), to Miss Dorothy Chalmers, B.Sc., for dealing similarly with Siphonogorgia (and a number of new 
species are hers), to Dr. J. J. Simpson for invaluable help at difficult corners and for revising a large part of the manuscript and editing 
the plates; and to Miss Alice M. Davidson for her admirable draughtsmanship and for her unfailing patience. 
SIBOGA-EXPEDITIE XIII d. 
I 
