MAEINE BIOLOGICAL STATION AT POET ERIN. 9 



tank. The supply pipe goes first to the upper storey, 

 gives off a branch to each tank, and a pipe with stop-cock 

 to the work-table, and then passes through the floor to 

 supply the tanks of the room below. The waste from the 

 system leads to the lowest of the floor concrete basins in 

 the lower storey, and from there out to the beach by a 

 drain pipe. 



As is usual in such cases, our tanks had to be filled and 

 supplied many times, stocked and re-stocked, before they 

 were seasoned and thoroughly cleaned, so that the water 

 would remain perfectly pure in them, and the animals and 

 plants live healthily. In fact, it was not until late in the 

 summer that some of them began to be permanently 

 established, and now during the winter we find that they 

 are looking very healthy, and many small things are begin- 

 ning to grow upon the glass and walls, forming a " self- 

 sown " fauna and flora, so they ought to be in excellent 

 condition during the coming season. 



In order to defray the expense of a laboratory boy who 

 would keep the place clean, and also with the view of 

 excluding those who were not really interested or desirous 

 of seeing the tanks, a small charge of 3d. each was made 

 for admission to the Aquarium during the latter part of 

 the summer after the tanks had been stocked. During 

 the four weeks when the Aquarium was thus open, we 

 had over 150 visitors, and the Treasurer received £1 

 17s. lOd. from this source. There is no reason why, 

 with the additional interest which our museum specimens 

 will give to the place, and under the charge of an ener- 

 getic curator, who will at stated hours take round 

 visitors and give short demonstrations, the Aquarium 

 should not be a considerable attraction in Port " Erin and 

 yield a fair revenue. The Aquarium at the Biological 

 Station in the small town of Arcachon.jn the South of 



