AE NAUTILUS. 
Vol. SXxXTTI JULY, 1919 No. 1. 
AN OLD COLLECTING GROUND REVISITED. 
BY CHARLES W. JOHNSON. 
While a resident of St. Augustine, Florida, from 1880-88, I 
made a careful study of the mollusca of the harbor and vicinity. 
The habits of the various species and the factors governing their 
distribution, which in many cases was much restricted, especi- 
ally appealed to me. With these facts in mind it was with 
great interest that I visited the old city after an absence of 
thirty-one years. Time and the ever-shifting sands have played 
sad havoc with many of my old collecting grounds, and I 
looked in vain for some of the rarer species. 
The accompanying maps can give only a general idea of the 
changes that have taken place.’ The ‘‘ Lagoon”? of the eighties 
is gone and there are now two inlets with about the same depth 
of water on each bar according to the government chart, survey 
of 1910, although I was told that the southern channel has now 
much less water on the bar than the other. Marsh Island at 
the mouth of Hospital Creek is also gone, and the sand bar that 
was formerly only east of the island now extends to the fort. 
There is no trace of the site of the old Spanish lighthouse, 
1Figure 1 shows the harbor and vicinity about 1883, before the St. Sebas- 
tian marsh was filled, also the approximate positions of the ‘‘ Lagoon’’ and 
Marsh Island. The figures refer to the species mentioned in the text that 
were found at those particular places. 
Figure 2 is based on the U. S. coast survey chart, No. 159, survey of - 
1910, and represents in a general way present conditions. 
