40 



TURRITELLA MORTONI. Tab. 16, fig. 11. 



Turrited, attenuated towards the apex, with spiral stria' ; volu. 

 tions concave, carinated at the base ; aperture effuse. 



Var. A. whorls rectilinear, spiral striae profound. 



Syn. T. CARINATA, Lea, Con. p. 129, pi. 4, Jig. 120. 



Localities. Claiborne, Alab. Piscataway, Md. 



Common : I first found the species in Maryland and described 

 it in the Journal of the Academy of Natural Sciences, v. 6, p. 221, 

 pi. x, f. 2. Mr. Lea re-figures it as new three years afterward. 



TURRITELLA OBRUTA. Tab 15, Jig. 12. 



Whorls 11, slightly convex, with about 7 sharp elevated stria? 

 on each and intermediate fine close set lines; area of the suture 

 indented : aperture subovate. 



Syn. T. LINEATA, Lea, Con. p. 180, pi 4, /. 121. 



Locality. Claiborne, Alab. 



TURRITELLA VETUSTA. Tab 15, Jig. 13. 



Turrited, with spiral raised lines alternated in size, and longi- 

 tudinal much arcuated wrinkles ; whorls angulated at the summit ; 

 aperture obliquely elliptical, effuse ; labrum extremely thin ; labi- 

 um somewhat folded, and slightly reflected at base. 



CERITHIUM? STRIATUM, Lea, Con. p. 131, pi. 4, /. 122. 



Very numerous but so rarely perfect that its generic character 

 has been hitherto mistaken. I referred to Melania? in No. 3, first 

 ed. Its aperture resembles that of T. melanoides, Lam. 



BULLA GALBA. Tab. 15, fig. 14. 



Subcylindrlcal, slightly contracted near the middle ; obsolete 

 spiral lines at base ; labium reflected at base ; aperture very nar- 

 now above, rather suddenly expanded inferiorly. 



Syn. B. ST HILLAIKII, Lea, Con. p. 98, pi. 4, /. 78. , 



[96] 



