EDITORIAL NOTES. 
This volume contains Parts XXVI., XXVII., XXVIII., XXIX., and 
XXX. of the Zoological Series of Reports on the Scientific Results of 
the Expedition. 
Part XXVI. — Dr. Rudolph Bergh of Copenhagen, who is well known to 
Naturalists from his numerous Papers on the Nudibranchiata, undertook 
the description of the specimens belonging to that group collected by the 
Expedition, and this Memoir gives the result of his investigations. The 
Manuscript was received on the 7th July 1883 — partly written in English 
and partly in German — the latter being translated into English by the 
Naturalists on the Editorial Staff. 
Part XXVII. — The Manuscript of the Report on the Myzostomida, by 
Professor L. von Graff, was received on the 11th October 1883. Dr. von 
Graff has, by introducing references to the original descriptions of the few 
species not collected by the Expedition, rendered this Report a complete 
Monograph of this interesting group of animals. 
Part XXVIII. — The Systematic Part of the Report on the Cirripedia, by 
Dr. P. P. C. Hoek, was published as Part XIX. of the Zoological Series of 
Reports on the Scientific Results of the Expedition. 
The present Memoir is a Supplementary Report by the same author, and 
deals with certain points in the anatomy of the group. The Manuscript of 
this second part was received on the 1st May 1884. 
