142 Trans. Acad. Sci. of St. Louis. 
species and by the elongate spire, very short and rather 
oblique aperture, broad shallow sinus formed upon a double 
submedian and more or less nodulose peripheral elevation and 
very short, broadly obtuse paucispiral embryo. The three 
species represented by material in my cabinet may be distin- 
guished among themselves as follows :— 
Nodules of the peripheral carinae smaller, not coalescent longitudi- 
nally; aperture one-third as long as the shell or nearly sO....-...-... 2 
Nodules of the peripheral carinae coarser, each being fused with its op- 
posite, forming large longitudinal nodules; spire relatively more 
elongate, the aperture about a fourth as long as the shell........+... 3 
2— Spiral carinules relatively coarser, generally two in number between 
the central double peripheral carina and the lower margin; lower of 
the two subsutural carinae nodulose; lines of growth very coarse, 
cancellating the body whorl below the convexity. Length of a 
specimen of 5 body whorls,7 mm.; width, 2.6mm. Upper Claiborne 
ferruginOUS SaNd...eccesseesecsecescecverece «++ terebriformis Meyer 
Spiral carinules fine; spire whorls shorter and more transverse, the 
second carinule below the suture simple and not nodulose; but one 
raised line between the periphery and lower margin and another 
forming the latter; space between the nodulose peripheral carinae and 
subsutural carinules much longer, being twice as long as the width of 
the peripheral band; lines of growth distinct and uneven but feebler than 
in terebriformis. Length of a specimen of about 7 body whorls, 10 mm.; 
width, 3 mm. Lower Claiborne Eocene of St. Maurice, La..obtusa n. sp. 
3—Form very slender; subsutural carinae simple, very coarse and nearly 
contiguous; peripheral carinae coarse, separated from the subsutural by 
aconcave space which is subequal in length to the width of the peri- 
pheral duplex band and having two fine but strongly elevated and very 
approximate spiral threads; space below the peripheral nodulose 
band but little longer than the width of the latter and having 
one coarse carinule and another forming the lower margin; lines of 
growth strong and uneven on the body whorl below the convexity. 
Length of a specimen of 9 body whorls, 10.6 mm.; width, 2.8 mm. 
Lower Claiborne Eocene of Moseley’s Ferry, Burleson Co., 
TOXAB o ccc cscs scence necccccccecvcerssecchovcceescoes LONGISPIFA D. Sp. 
In derebriformis the spiral depression below the subsutural 
carinae is only about as long as the width of, the duplex peri- 
pheral band, while in obtusa it is fully twice as long as the 
latter, giving these two species a distinctly different facies. 
Longispira is widely different, and, besides the characters 
noted in the table, has a still shorter, more obtuse and 
scarcely at all reflexed beak, which is sometimes umbilicate 
along the callus of the inner lip; it was collected in consid- 
