[ >59 3 
Our common FreJh-JVater Mufcles differ from out 
Salt-Marfh Mufcle, in that they are not fixed to any 
Place or Thing, but have a Method of trailing along 
on the Tandy Bottoms of Creeks and Rivers: They 
have the Power not only of opening and (hutting their 
Shells at Pleafure, but have, moreover, the Power 
of creeping (a) along as it were like a Snail, by turn- 
ing upon the upper Edge that opens, and fo work 
themfelves along the foft yielding Sand in little Fur- 
rows about half an Inch deep. I have traced them 
for feveral Yards, by thefe little Chanels, when the 
Tide is down, and left the Sands bare. 
If thefe few Obfervations prove acceptable, it will 
be a Pleafure to 
Tour Friend, 
John Bartram. 
VII. A Letter from Mr . Chrifl. Hunter, to 
Dr. Mortimer, Seer . R. S. ferving to ac- 
company a Copy of an antient Roman In- 
fer ip t ion at Rochester in Northumberland, 
and two others at Rifingham. 
IVorthy Sir , 
Durham^Sept .9, 1744. 
Read Nov. 8. 
1744. 
1ND Providence enabling me to 
K outlive fuch Members of the Royal 
Society I have had the Happinefs to correfpond withal. 
Dr. 
(a) I have feen this of our Horfe -Mufcles in Ponds here in England. 
C. M. 
X 
