177 Eocene Mollusca i i 



aperture oblong-ovate; outer lip simple; base of shell pointed 

 and curved upwards; inner lip incurved, refledled in its anterior 

 half, the spirals become coarser at the base of the shell and at 

 their jucftion with the inner lip. 



This species belongs to the se(ftion Crenilabium of Cossmann, 

 and is especially distinguished from the other secftions by the 

 absence of a fold and by its pointed aperture at base. 



Locality. — Alabama: Figured .specimen from Gregg's Land- 

 ing; also found in Wood's Bluff horizon at Choc- 

 taw Corner. 



SCAPHANDER. 



Scaphander ligniticus n. sp., PI. 2, fig. 4. 



Shell thin, cylindrical, narrowing posteriorly; outer lip rising 

 above the shell; surface finely striated. 



Differs from .S". alabamensis Aid. in its being narrower poste- 

 riorly and longer, and from ^. primus Aid. by its more regular- 

 ly cylindrical shape. A specimen is in the National Museum, 

 Washington. 



Locality. — Alabama: Wood's Bluff horizon at Chocftaw Cor- 

 ner. 



CERITHIOPSIS. 



This genus is represented in the Eocene by C. nassula Con. 

 from the Claiborne sand bed; C. langdoni Aid. from Red Bluff, 

 Miss. , which form has been considered to equal the first named 

 species. Both are LovenellcB, but Conrad's species has only three 

 tuberculated revolving lines, while the latter has five. Both 

 shells are mature. The first named species has also been re- 

 corded from Newton, Miss. C. aldrichi Mr. belongs in the sec- 

 tion Metaxia according to Prof. Dall. It is recorded from Red 

 Bluff and Jackson, Miss., and Claiborne, Ala. C. jacksonensis 

 Mr. is equal to C. nassida Con. according to Prof. Dall and 

 seems to connedt C. langdoni Aid. with it. C. bicostellatmn Con. 

 described as a Ccrithium is a Cerithiopsis. It has not been fig- 

 ured. The following forms seem to be new. 



Cerithiopsis dalli n. sp., PI. i, figs. 5, a. 



Shell subcylindrical, ornamented with tw^o rows of tubercles 

 which are indented with two or three revolving impressed lines, 



