56 THE NAUTILUS. 



TJnio 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 flattened 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 2i inches, 

 length Is inches, diameter f 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 

 NAUTILUS 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. is in 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, 111. for 

 General Secretary for 1898. Dr. Strode has been a valued mem- 

 ber for years. 



