68 Bulletin 1 1 68 



smooth; whorls of the spire carinate and slightly tubercled; a 

 row of upright longitudinal nodes on the shoulder of the body 

 whorl, none below; a single, strong varix on the body whorl; 

 aperture ovate; inner lip spread over the whorl, with three pli- 

 cations on the upper part, smooth in the central part and plicate 

 below; outer lip refiedled, plicate on the inner edge above and 

 below, smooth in the center; canal narrow, strongly twisted. 

 Length 1.4; breadth .9. 



''Locality. — Red bluff, Miss. 



"This species differs from C. carinata I^am. in having a single, 

 strong varix. It is lighter in substance. I describe it with re- 

 luctance, basing its specific difference principally upon the pres- 

 ence of the strong varix." 



As stated in the Proc. Acad. Nat. Sci. Phila., p. 479, "This 

 specimen shows an unusually large number of nodules on the 

 humeral carina. In front, the two lower carinae are without 

 nodules, while on the back all three carinse are strongly nodular. 



''Locality. — Bell's landing, Ala." 



We have found no additional specimens. 



Cassidaria dubia Aid. 



Syn. C. dubia Aid., Jr. Cinn. Soc. Nat. Hist., 1885, p. 153, pi. 3, fig. 21. 

 C. dubia Aid., GeoL Surv. Ala., Bull, i, p. 33, pi. i, fig. 21, 1886. 



Aldric/i's original descriptio?i. — "Shell ovate; whorls, six to 

 seven; sculptured the same as C. carinata I,am; nodes sharp, 

 longitudinal, situated on the shoulder of the body whorl; suture 

 channeled; whorls of the spire with a circle of nodes, sub-central; 

 outer lip toothed above and plicate on the whole of the inner 

 edge; inner lip strongly plicate-costate its entire length; toothed 

 above. Length about one inch; breadth .7. 



"Locality. — Headwaters of Bashia creek, Clark county, Ala., 

 near Woods bluff. 



"Differs from all other species mentioned in the plications of 

 the aperture. Prof. A. Heilprin (Proc. Acad. Nat. Sci., 1880, 

 p. 365), in his list of fossils from Cave Branch, mentions a 'Cas- 

 sidaria (fragment) closely allied to C. carinata Lam,' which is no 

 doubt the species above described." 



