THE 



VOYAGE OF H.M.S. CHALLENGER 



ZOOLOGY. 



REPORT on the Actiniaria dredged by H.M.S. Challenger during the 

 years 1873-1876. By Prof. Richard Hertwig. 



SUPPLEMENT. 



INTRODUCTION. 



After I had concluded my Eeport on the Actiniaria of the Challenger Expedition, 

 a number of additional specimens were sent to me, on which I now present a short 

 Supplementary Report. Unfortunately the work has been delayed longer than I could 

 have wished, partly on account of a series of experimental investigations upon the 

 fertilisation and segmentation of the ovum, which I had undertaken in concert with my 

 brother, but mainly owing to the claims on my working-time caused by my trans- 

 ference from Konigsberg to Bonn, and from Bonn to Munich. 



Amongst the material occurred several specimens of species which have been previ- 

 ously described and can therefore be treated in few words ; besides these, there are also 

 several new forms, representing new and interesting genera, which require a detailed 

 description, and which are, for the sake of clearness, designated by an asterisk. At the 

 end (p. 54) will be found a list of those Actinias of which a systematic study was 

 impossible, either because they were not sufficiently well preserved, or because their 

 appearance was no longer characteristic owing to the absence of sculpturing and colour, 

 the necessary result of the method of preservation. 



Since the publication of the earlier part of this Report, the great monograph of 

 Angelo Andres on the Actiniaria has appeared. 1 During the progress of his work this 



1 Fauna und Flora des Golfes von Neapel, Le Attinie, 1884. 



(ZOOL. CHALL. EXP. — PAET LXXIII. 1888.) lUldd 1 



