Io6 BULI.KTIN 31 IC6 



Dimensions : Longeur, 7.6 mill. ; largeur, 5 mill. 

 Loc. — Claiborne, une seule valve"", ma coll. 



Sporiella alabamiensis Aid., PI. 37- Fig. 4- 



Lepton? alabamiensis, Bull. Am. Pal., vol 2, 1897, p. 182, pi. 6, fig. 9. 

 Sportella alabamiensis Dall, Trans. Wag., Ill, 1900, p. 1140. 



For description of this species, see Aldrich's article referred 



to in the synonymy. 



Hindsiella faba Meyer, PI. 37. Fig. 5. 



H.faba Meyer, Bull, i, Geol. Surv. Ala., 1886, p. 82, pi. i, fig. 25. 

 Kelliafaba de Greg., Mon. Faun. Eoc. Ala., 1890, p. 211. 

 Hindsiella faba Dall, Trans. Wag., Ill, 1900, p. 1136. 



Meyer's original description. — Shell convex ; sinus of the ventral 

 margin gently rounded; covered with regular lines of growth ; musclar im- 

 pressions ovately elongated ; an indistinct oblique tooth below the beak 

 ( right valve ) , 



Locality. — Claiborne, Ala. 



Allied to Hindsiella arcuata Lam., sp. of the Paris Basin. 



Hindsiella (faba var. ?) donacia Dall, PI. 37. Fig. 6. 



H. {faba var.?) donacia Dall, Trans. Wag., Ill, 1900, p. 1136, pi, 

 45, fig. 12. 



Dall' s original description. — Shell small, donaciform, with variable 

 outline, rather compressed, inequilateral, the posterior side shorter, anterior 

 dorsal margin sloping to the rounded anterior end, base slightly insinuated ; 

 posterior dorsal margin with a shorter and steeper slope, the posterior end 

 of the shell subtruncate obliquely, the basal angle rather marked ; the 

 whole shell slightly twisted ; surface with concentric, somewhat irregular 

 .incremental lines and microscopic, partly obsolete radial striae; interior pol- 

 ished, hinge like that of H. faba but with the right cardinal more promi- 

 nent and stem-like, the left cardinal obsolete ; in some specimens the resil- 

 iary insertion was directly on the surface of the valve, in others (probably 

 more mature) there was a distinct thickening, especially about the margin 

 of the scar. Long. 2.2, alt. 1.7, diam. 0.6 mm. 



This shell is probably distinct from H.faba. It is more triangular, 

 more inequilateral and more compressed. The sinuation of the base is 

 much less conspicuous, the cardinal tooth is longer, and the laminae pro- 

 portionately shorter than in H.faba. Several specimens with the valves in 



*See Aldrich, Bull. Am. Pal., vol 2, 1897, pi. 6, fig. 4 for the opposite 

 valve. (Fig. 3, b of this report). 



