148 Association of American Geologists and Natitralists. 



the Peninsula, at Port Eoyal. Two different types of animals exist 

 in the pond, one 18 inches below the surface, the other some two 

 feet or more below the surface; the line of demarcation between 

 them is perfectly distinct. 



A few remarks were made upon the subject by Dr Holbroke of 

 Charleston, South Carolina. 



Professor Agassiz said that the same species of fish were found in 

 the head waters of the Rhine, the Rhone, and the Danube ; and 

 that there Avas no communication between the basins of the three 

 rivers. The same species had also been found in the mountain 

 rivers of Norway and Sweden. These facts shew that one species 

 is not confined alone to one basin or series of basins. 



A paper was read by Dr Dickeson, on the Cypress Basins of 

 Louisiana and Mississippi. He spoke of the geographical distri- 

 bution of the cypress — the habits of the tree. It runs parallel 

 with the cotton plant. But a small proportion of the wood is avail- 

 able for mechanical purposes. But little can be transported to 

 market, as the specific gravity is greater than that of water. The 

 cypress growing along the bayous is of an inferior character ; 

 that growing along the Mississippi river is a much better wood. 

 There are remains of cypress stumps which must be at least 4000 

 years old. In the texture and quality of thes wood there is great 

 variety. 



A letter was read from George G. Smith, extending an invita- 

 tion to the members to attend the fair of the Charitable Mechanics' 

 Institution. A letter was also read from Moses Kimball, giving 

 the members an invitation to visit the Boston Museum. 



Professor H. E. Rogers read extracts from a report made by 

 Lieutenant Maury, and presented to the Association a chart, shew- 

 ing the currents of the Northern Atlantic Ocean. The publication 

 of these charts is to be continued, shewing the currents in other 

 parts of the Atlantic and in the Pacific oceans. The hope was ex- 

 pressed that these charts would enable navigators to make their 

 voyages in shorter times, and with less labour and difficulty, than 

 is done now. 



In the evening, the Association met at half-past seven o'clock, 

 and a paper was read by Dr Prescott upon the fishes found in Lake 

 Winnepissiogee and its tributary waters. 



Dr Storer made a remark or two upon this paper. 



A communication w.is made upon the subject of concretions by 

 Professor Adams. 



Remarks upon this subject were made by Professors Haldeman 

 and Johnson of Pennsylvania. 



The Association adjourned at nine o'clock p, m., to accept an in- 

 vitation extended by Dr Warren to the members to call upon him 

 socially at his residence. The Association has visited several of our 

 hospitable citizens since the commencement of the meetings in this 

 city. 



