138 THE NAUTILUS. 







Mr. Verdi Burtch, of Peuu Yan, N. Y., who is a working student iu 

 Unionidoe 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. Epidermis 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- 

 ciuatiou 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 1J, diam- 

 eter 1} inches. 



Habitat: St. Mary's River, Florida. 



Remarks: Affinity, U. bnrtchianus, 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. 

 burtehianui in having greater inflation, less pointed behind, rays less 

 distinct, greater dorsal curvature, higher sides and rougher. It is 

 named for Mr. \V. V. Lehman, a specialist in fossil insects, and an 

 energetic student of Unionid:e. 

 TJnio 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 behind. 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 



