97 LiGNiTic Stage 97 



Gabb's original description. — "Elongate slender, polished; 

 whorls eight; apex acuminate, mouth small, outer lip nearlj' 

 straight. Dimensions: Length, .23 in.; width of bods' whorl, 

 .05 in.; length of mouth, .05 in." From Caldwell, Texas. 



The broken specimen now in -the Philadelphia Academy's col- 

 lecftion, supposed to be the type, does not agree in all respedls 

 with Gabb's figure and description. I am not sure of the present 

 identification, having only the imperfe(5l specimen figured. 



Specimen Jjgnred. — Woods bluff, Ala. Now in Paleont. Mus., 

 Cornell Univ. 



Niso umbilicata, PI. 12, fig. 13. 



S3T1. Pasithea nvibilicata Lea, Cont. to Geol., 1833, p. 103, pi. 4, fig. 85. 



Niso umbilicata D'Orb., Prod. 2, p. 318, t. 92. 



{Bonellia lineata Con., Jr. Phila. Ac, ist. Ser.. vol. 8, though re- 

 ferred to ui)ibilicata Lea by Con., Am. Jr. Conch., vol. 

 I, p. 29, is doubtless very distindt, presumably from the 

 Miocene of Mar3'land. ) 



Niso umbilicata de Greg., Mon. Faun. Eoc. Ala., 1890, p. 162, pi. 

 16, fig's. 7, 8. 



Lea' s origijia I description. — "Shell elevated above, rounded be- 

 low, sub-carinate, polished; substance of the shell thin; apex 

 acute; suture linear; umbilicus large; whorls nine, flattened; 

 mouth subovate, acutely angular above, one-fifth the length of 

 the shell; columella incurved at base; margin entire. Length, 

 .2 in.; breadth, .1 in. * * * Its umbilicus is wide, with a 

 large spiral groove. On some of the whorls the line of growth 

 may be indistinctly seen." 



Lea's specimen was small and imperfecft. The "spiral groove" 

 does not seem to occur in our Claiborne specimens, but high up 

 in the umbilicus there is sometimes a longitudinal plaiting. 



Lignitic localities. — Ala.: Woods bluff; Yellow bluff. 



Specimen figtired. — From Woods bluff; Paleont. Mus., Cornell 

 Univ. 



Type. — Lea colledtion, Phila. From Claiborne. 



Eulimella tenua, Pi. 12, fig. 16. 



Syn. Eulima tentia Gabb, J;-, ^c. Nat. Sci. Phila., vol. 4, p. 3S6, pi. 67, 

 •fig. 45, i860. 



