( 67 ) Tertiary Mollusca of Ala. and Tex. 15 



them ; body whorl rounded, convex, contracted below centre to 

 form the base on which the lines of growth are more strongly 

 marked ; aperture oblong-ovate outer lip channelled anteriorly, 

 thickened and expanded posteriori}' and strongly sigmoid. 



Locality. — Matthews' Landing, Ala. 



The figu 'ed tj^pe shows a strong varix on the body whorl 

 which is not generally present. Whorls vary from seven to nine. 

 Rather common. 



TUBA. 



Tuba (^Mathilda') daiborneyisis K\^6.. PI. i, fig. 7. 



J. Cin. Soc. N. H., July, 1887. 

 A figure is here given of this species. It is quite a rare shell. 

 It seems as if Mathilda should be retained as a subgenus of Tuba. A 

 careful examination of Lea's species of Tuba, show that T. sulcata 

 is a broken specimen of Raiiella. macluri Con. phis Pisaiiia clai- 

 bornensis Whitf. plus Triton pyramidatum H. C. Lea and is a 

 Triton . 



CERITHIO DERMA . 

 Cerithioderma {Mesostoma) prima Con. PI. i, fig. 10. 



Mesostoma lisbonensis Aldr. (MS.) 



Differs from the typical form in being much coarser, with 

 smaller aperture, more robust and short. I am satisfied that 

 Dall is correct (Tr. Wagner Inst. p. 293, 1892) in uniting this 

 form to Conrad's shell and that C. rugosa Heilprin is a synonym. 



Locality. — Lisbon, Ala. 



MELANOPSIS. 



Melanopsis planoidea, nov. sp. PI. 2, fig. 7. 



Shell ovoid, spire high ; whorls smooth; over five in number; 

 body whorl large; suture distinct, apex eroded; aperture ovate, 

 angular at posterior, outer lip thin, extending below the terminus 

 of the columella ; inner lip bent and slightly twisted at the ex- 

 tremity; callus thin, moderate, thickened posteriorly. 



Locality. — Gregg's Landing, Ala. 



This species resembles M. anita Aldr. described from the same 

 locality, but differs in shape; the body whorl is not so large or so 

 long and the spire more regular ; apex is missing ; outside of the 

 slightly excised canaliculate aperture it more nearly rCvSembles 

 the genus Goniobasis. 



