570 Dr. R. von Willemoes-Suhm on Observations 



the Annelids collected in H.M.S. ' Porcupine ' and ' Lightning,' as well 

 as by our own experience during our stay in the ' Challenger.' Though 

 I afterwards did not examine them with so much care as at the beginning, 

 I nevertheless have continued during the whole time to collect them as 

 well as possible, and to examine those which wanted to be drawn when 

 alive or w T hich seemed to be particularly interesting. To the latter forms I 

 shall refer in the course of this report. 



Of the Gephyreans I have worked out immediately all those forms which 

 were not quite common Sipunculids, and shall give a short account of 

 them below. 



The other classes of worms (Balanoglossus, Nemerteans, Polygordius, 

 Nematodes, &c.) have been met with rarely in deep water, but have all 

 the more been taken care of. 



Having caught, on our way from Gibraltar to Madeira, a large female 

 of Cystisoma Neptunus, and been able to work out the then perfectly 

 unknown structure of both sexes of this interesting Amphipod, my atten- 

 tion was drawn towards the Crustacea, all the more so as the dredgings 

 from deep water brought up forms which proved to be of the highest 

 interest and peculiar to those depths. These I have, as far as they were 

 anatomically interesting, worked out during our cruises in the Atlantic 

 and the Antarctic, when I found that I had laid a good foundation to 

 our knowledge of the deep-sea Crustacea, and that after that new forms 

 or new and peculiar genera (as far as their anatomy or zoological position 

 goes) rarely turned up. These researches, as far as the Atlantic Crustacea 

 are concerned, have been presented in a paper to the Linnean Society 

 (Linn. Trans. 2nd ser. Zool. vol. i. pp. 23-59, pis. 6-13). 



The surface Crustacea had of course during that time also attracted 

 my attention, and had been always collected ; but only in the Antarctic 

 and in the Pacific, when I had more time to bestow upon them, I began 

 systematically to work out the development or the anatomy of all those 

 forms which seemed to me especially interesting. 



Many drawings and notes have of course also been made on other sur- 

 face animals, especially Pteropods, mollusks, &c. ; and they have, as far 

 as I was able to determine them, been put down in the " surface-book " 

 on the days when they were found. 



This surface-book, as well as the " station-boolc" have been during the 

 whole time under my charge, as I also had to bottle and label the Inver- 

 tebrates which were brought into the laboratory. 



Whenever we were in harbour, and the place was little- or unknown, 

 I had to collect the Invertebrata, especially land-shells, insects, Crustacea, 

 and worms, in which excursions I took of course as many of the Eeptilia 

 or other Vertebrates as could be procured. Shooting birds has been done 

 by me in some places, especially in the South-Sea Islands, but never regu- 

 larly, and more for recreation than for collecting systematically. 



In the following pages I shall try to give a preliminary account of the 



