187 Midway Stage 73 



Scaphopoda. 



DENTALIUM. 



Dentalium viediaviense , PI. 7, figs, i, a. 



Syn. D. niimutistriatmn Dall, partim. Trans. Wag. Fr. Inst. 

 Sci., vol. iii, p. 438. 



Specific characterization. — Size and general form as shown by 

 the figures; surface nearly smooth near the greater extremity, 

 though showing some irregular slight annulations; above, becom- 

 ing longitudinally striate with alternating fine and coarse lines, 

 annulations plainly visible and very regular; shell, about larger 

 aperture very thin, but becoming very thick within half an 

 inch of this extremity. 



After examining hundreds of D. minutistriatum from typical 

 localities in Texas, the writer noted in his MS. report on the 

 Mollusca of that State that the Prairie creek, Ala., specimens 

 had certain marked characters not possessed by minuiistriatum. 

 The Midway species are large, sometimes quite large and attain- 

 ing a maximum diameter of ji inch; their striation is very plainly 

 alternate and sometimes becomes quite strong towards the apex; 

 they have clearly defined and regular annulations; they are 

 much more tapering than minutistriatum. 



Localities. — Mississippi: }i mi. N. of Ripley. i 



Alabama: Black Bluff; ^ mi. W. of Graveyard 

 hill; ? Dale's Branch; i mi. N. of Allenton. 



Type. — Paleontological Museum, Cornell Univ. 



CADULUS. 

 Cadulus turgidus, PI. 7, fig. 2. 



Syn. C. turgidus Meyer, Bull. No. i, Geol. Surv. Ala., 1886, 



p. 65, pi. I, fig. ID. 



Meyer' s original description. — " Width of the shell rapidly in- 

 creasing for about two-thirds of the entire length, and then 

 more rapidly decreasing; section circular. 



''Locality. — Matthews' Landing, Ala. 



"Rather common; I received this shell from Mr. Aldrich. 

 It differs by its very strong inflation from all the other species 

 of Cadulus of the Southern Tertiary which I know of. ' ' 



Localities. — Alabama: Matthews' I^anding; i mi. W. of Oak 

 Hill; Dale's Branch. 



