138 THE NAUTILUS. 
Mr. Verdi Burtch, of Penn Yan, N. Y., who is a working student in 
Unionide and ornithology. 
Unio Lehmanii sp. nov. 
Shell ovate, uniformly thick, evenly rounded before and broadly 
pointed behind, and slightly biangulate. Dorsal and basal curves 
equally convex. Enpidermis reddish-brown, smoothish, numerously 
and faintly rayed. Lines of growth obscure and slightly raised. . 
Umbonal slope broadly rounded, making in old shells a slight un- 
cination at the posterior end. Beaks broad and short, not raised. 
Posterior margin not keeled. Cardinal teeth broad, rather com- 
pressed and much laciniated, the anterior cardinal elevated, crested, 
ending in a long, thin, sharp edge, nearly truncated, which points 
forward and downward. Lateral teeth heavy and nearly straight, 
with a curve in the dorsal plate. Cicatrices distinct. Cavity of 
shell very broad and quite uniformly excavated. Beak cavities not 
deep, but broad and obtuse. Nacre purplish, lighter and sometimes 
salmon, within the pallial line. Width 3 inches, length 17, diam- 
eter 14 inches. 
Habitat: St. Mary’s River, Florida. 
Remarks: Affinity, U. burtchianus, which, with our shell, seems 
to form a distinct group confined to St. Mary’s River, stationed be- 
tween the Buckleyi and Forbesianus groups. It differs from U. 
burtchianus in having greater inflation, less pointed behind, rays less 
distinct, greater dorsal curvature, higher sides and rougher. It is 
named for Mr. W. V. Lehman, a specialist in fossil insects, and an 
energetic student of Unionide. 
Unio Brimleyi sp. nov. 
Shell quadrate, bluntly pointed behind, slightly inequilateral. 
Sides gracefully rounded, subemarginate below and slightly arched 
above. Epidermis olive, with transmitted light, rayless and with 
very numerous finely striated raised crinkled lines. Shell thick on 
the anterior half and much thinner behine. Lines of growth three 
or four and faint. Ligament dark red and prominent. Greatest 
diameter in the shell center. Posterior slope with two impressed 
divergent broad and shallow grooves, from beaks to posterior mar- 
gin. Beaks broad and rounded, slightly raised. Umbonal slope 
broad and keeled. Beak cavity moderately deep. Cardinal teeth 
double in both valves, erect and serrated. Laterals thin and 
straight, and in the left valve continuous with the cardinals. Cica- 
trices distinct. Dorsal cicatrices concealed from view. Pallial 
