120 THE NAUTILUS. 
and Dr. Paul Bartsch of the U. S. National Museum, and I am 
under many obligations for their kind assistance. 
The specimens were picked up in a general way and no special 
effort was made to secure large series or the minute species. 
As my residence is in the extreme northern part of Maine 
and I have only a small library on shells, I will follow Bulletin 
No. 87, U. S. National Museum, by William H. Dall. Al- 
though the classification is not up to date, it has a great ad- 
vantage as nearly all are familiar with the names used in that 
work, 
In December, 1891, around Jacksonville I obtained many 
dead specimens of Polygyra vannostrande Bld. and P. jejuna Say, 
and in the St. John’s River Vivipava georgiana Lea and Cyrena 
carolinensis Lam. 
In January, 1892, I made two trips to Pablo Beach on my 
first visit going towards Mayport. For a distance of four miles 
the beach was covered with the large valves of Cardium magnum 
Born; such a mass of shells I had never seen. On my second 
visit, a week later, there was not a Cardium to be found or 
hardly anything in the line of shells. The two trips to Pablo 
Beach yielded the following species: 
Purpura floridana Conr. Two specimens. 
Labiosa (Raeta) canaliculata Say. Three single valves. 
Tellina alternata Say. Five perfect specimens. 
Dosinia discus Rev. Four fine specimens. 
Petricola pholadiformis Lam. One single valve. 
Pholas costata Linne. Single valves common. 
Pinna seminuda Lam. Common. 
Pinna muricata Linne. Common. 
Donox variabilis Say. The sand at low water mark was filled 
with these shells. 
Arca incongrua Say. Few fine specimens. 
Arca ponderosa Say. Two living specimens. 
Cardium robustum Sol. Common. 
In the month of February I started on a four weeks trip from 
Jacksonville to Titusville by rail, and then by steamer the whole 
length of Indian River to Jupiter and Lake Worth. While 
examining the limestone outcrops at Rock Ledge on Indian 
