332 proceedings of the academy of [1897. 



September 7. 

 Mr. Charles Morris in the Chair. 

 Fourteen persons present. 



September 14. 



Mr. Charles P. Perot in the Chair. 



Twenty-nine persons present. 



A paper entitled "The Annual Molt of the Sanderling," by 

 Witrner Stone, was presented for publication. 



Scalpellum and Bala r nus from Texas. — Mr. Pilsbry exhibited 

 fossil valves of Scalpellum and Balanus collected in Texas by Mr. 

 Charles W. Johnson, and described the former as follows: 



Scalpellum Chamberlaini n. sp. Tergum (fig. 1) very thick 

 and strong, of very irregular contour, the scutal and carinal mar- 

 gins subparallel. Apex conspicuously recurved ; occludent margin 

 very convex ; carinal margin sigmoid, being markedly concave from 

 the apex two-thirds of the distance to basal angle, then bending in 

 the opposite direction ; scutal margin slightly sinuous, nearly 

 js\ straight, along the portion adjacent to the scu- 

 ^yjt\ turn, then abruptly deflected, the two-fifths near- 

 est carina running upward to the basal or distal 

 angle. Sculpture consists of well-marked, fine 

 growth-strife and radial ribs and strise ; the prin- 

 cipal radii are (1) a strong curved rib from apex 

 to basal or distal angle, (2) a sharper but more 

 slender rib running to the angle on the scutal margin, (3) a low, 

 wide rib along the occludent edge, and (4) a low, often obscure rib 

 running between (2) and (3), and producing a slight sinuosity in 

 the scutal margin. Besides these radial ribs, there are numerous 

 fine radial lines throughout. Inside the surface is nearly smooth, a 

 trifle excavated mesially or below, rising into a heavy callous ridge 

 near the scutal margin, and equally thick along the occludent 

 border. The apex is slightly free, with a small area sculptured with 

 recession lines. 



Dimensions : length of occludent margin 14 mm. ; length of valve 

 from middle of occludent margin to basal or distal angle 24 mm. 



Locality and horizon : Berryman's Place, three miles northeast 

 of Alto, Cherokee Co., Texas, Lower Claiborne Eocene. 



Four terga were collected by Mr. Johnson at the above-mentioned 

 locality, all being from the left side. No other plates were found. 



