50 BULLETIN OF THE BUREAU OF FISHERIES. 
of information respecting any of those subjects that I have mentioned. This 
book is called for. It has been called for for several years. I have issued 
two editions of The Fishermen’s Practical Navigator, of which this will be the 
third, brought up to date; and it includes steam fishing vessels, with all the 
modern improvements and gear. I should be very pleased to hear from anyone 
who is for progress in the same direction. 
The PRESIDENT. A motion to refer to the committee on resolutions is in 
order, unless there is further discussion. 
[The motion was made and duly seconded. ] 
The PRESIDENT. The motion has been made and seconded, and if there are 
no objections the chair will so refer. 
The paper by Mr. William P. Seal, namely, ‘‘ Fishes in their Relation to the 
Mosquito Problem,” is a paper that the chair has received several requests for, 
and if Mr. Seal is here, or if there is some one here who will present the paper 
for him, that paper will be the one now called for on the programme. [After a 
pause.] Mr. Seal is in attendance, I am informed, but he seems to be out at the 
present moment. [For this paper see pages 831-838.] 
Then the paper by Professor Wilson, which is ‘‘On the Development of 
Sponges from Tissue Cells Outside’ the Body of the Parent,” will be called for, 
and I shall ask Doctor Moore if he will kindly introduce the discussion on this 
paper when the reading is finished. 
[Prof. H. V. Wilson presented his paper, which appears on pages 1265—-1271.] 
The PrEsIDENT. Are you willing to leave these specimens on the table, 
Professor Wilson, for a little opportunity to examine them? Perhaps Professor 
Wilson will be willing to meet you at the close of this session for a few moments, 
and explain the preparations to those who care for a special explanation. 
Doctor Moore has asked me to state that he has a number of things to 
attend to just now, and that he would prefer not to undertake to discuss the 
paper of Professor Wilson. Nevertheless, he would like me to state that in the 
basement of the building of the Bureau of Fisheries there is an exhibit that 
shows the process of budding and growth of commercial sponges. You will find 
an exhibit made there which represents the work that the United States Bureau 
of Fisheries has done during the experiments for some years past in this most 
important matter. 
Are there other questions to be asked of Professor Wilson from the floor? 
If not, I shall ask Doctor Evermann to present in abstract the paper, ‘ Experi- 
- ments in the Artificial Propagation of Freshwater Mussels,” by Prof. George 
Lefevre and Prof. W. C. Curtis. 
Dr. B. W. EVERMANN (U. S. Bureau of Fisheries). Mr. President and gen- 
tlemen, I regret very much that neither Doctor Lefevre nor Professor Curtis has 
found it possible to be present at this congress. We all felt, however, that 
something should be said regarding certain experiments which they have been 
carrying on. I shall not present the formal paper which they prepared, but 
