Geological Survey of Alabama. 37 



rior half of the shell crossed with raised radial lines forming imbrica- 

 tions, which grow stronger as we approach this end. Anterior dorsal 

 margin winged, this part showing only the continued concentric lines ; 

 umbonial processes large, reflected; anterior ventral margin strongly 

 notched. Internal process broad, spatulate. 



Localities. Gregg's Landing and Bell's Landing, Ala. 



This shell was no doubt the one found by Prof. Tuomey and given in 

 his list of species at Bell's Landing under the name of Pholas Roperiana. 

 He never described it ; the figure (9) nine is erroneously numbered 4' by 

 the lithographer. 



MARTESIA ELONGATA, n. sp. PI. 4, fig. 10. 



Shell gaping above, elongated, sub-cylindrical; the anterior and cen- 

 tral part of surface marked with concentric ribs, balance of posterior 

 smooth. A strongly impressed groove running from the beaks to the 

 ventral margin, the concentric ribs being more prominent on the sides of 

 this groove. 



Beaks strongly recurved toward the anterior, situated close to this 

 end, which is truncate. 



Locality. Yellow Bluff, Ala., Bell's Landing Group. 



This species was taken from a piece of lignite by D. W. Langdon, Jr. 

 The shell has the markings of the dorsal accessory plate. 



SOLEN LISBONENSIS, n. sp. PI. 4, fig. 4. 



Shell linear, nearly straight ; posterior sub-truncate ; anterior obliquely 

 rounded with a depressed space behind running to the beaks; lines of 

 growth prominent, bending at right angles along a line running obliquely 

 from the beaks to the junction of the posterior and ventral margins. 

 Anterior widely gaping. 



Locality. Lisbon, Ala., just above the Buhrstone. 



MACHA VICKSBURGENSIS, Aldr. PL 2, fig. 1. 



Solecurtus Vicksburgensis, Aldr. J. C. S. N. H., July, 1885. 



PANOP^EA PORRECTOIDES, n. sp. PL 4, fig. 3. 



Shell thin, oblong, ventricose ; surface marked by lines of growth ; an- 

 terior side expanded, posterior produced. Ventral margin nearly 

 straight. Beaks incurved, pointed, wrinkled by lines of growth. The 



