56 THE NAUTILUS. 
Unio Suttoni sp. nov. 
Shell oblong, roughened by growth lines and solid, sides dilated 
almost to the extremities, and slightly constricted near the middle 
of the base. Base slightly convex or subemarginate, bluntly pointed 
behind and very abruptly rounded or subtruncate before and 
slightly arched above. Epidermis reddish or pale olive, with very 
obscure rays or rayless, slightly wrinkled on the posterior dorsal 
area or smooth. Beaks depressed and umbos fiattened or slightly 
rounded. Umbonal ridge obtusely rounded and elevated from beak 
to base. Cavity of the shell ample and quite uniform; cavity of 
beaks slight. Nacre heavy, and varying from satin white to dark 
copper color, and slightly thinner behind. Cardinal teeth erect, 
somewhat compressed and bluntly notched. Lateral teeth long and 
slightly curved, rather slender and compressed. Width 2% inches, 
length 14 inches, diameter { inch. 
Habitat.—Lake near Candler, Marion Co., Florida. 
Type and forms in National Museum. 
Remarks.—This is an exceedingly variable species like the type 
of the group to which it belongs, U. Buckleyi Lea, It may always. 
be distinguished from that species by the greater fullness in the pos- 
terior portion, and has a slight constriction where that is usually 
enlarged. It may be distinguished from U. Ferrissii Marsh, by its. 
greater and more uniform inflation, straighter base, more obtuse 
umbonal angle, and is in every way a more massive shell. Fifty 
-specimens have been received from Mr. B. Sutton, of Candler, 
Marion Co., Florida, for whom we name the species. 
ISAAC LEA DEPARTMENT. 
[Conducted in the interest of the Isaac Lea Conchological Chapter of the Agassiz Associa- 
tion by its General Secretary, Mrs. M. Burton Williamson. ] 
After the General Secretary had forwarded the MS. for THE 
Nautiuus for August, she received a letter from Mr. A. H. Gardner 
notifying her in re the vol. of Transactions. Mr. J. J. White, and 
Mr. M. Leon Walker have also reported. At this writing Aug. 10» 
the vol. isin Mass. The Secretary appreciates the notification when 
the book has been forwarded. 
It is not too early to canvass for our next General Secretary. The 
present one would nominate Dr. W. S. Strode, Lewiston, Il. for 
General Secretary for 1898. Dr. Strode has been a valued mem- 
ber for years. 
