WHITE.} CARBONIFEROUS FOSSILS. 169 
Genus PLEUROTOMARIA Defrance 
PLEUROTOMARIA BROADHEADI (sp. nov.). 
Plate 42, figs. 1 a and D. 
Shell large, narrowly umbilicated; spire somewhat extended, its length 
not quite half the full length of the shell; volutions about seven, strongly 
convex from suture to suture, gradually increasing in size; last volution 
large, somewhat produced on its proximal side, especially near the aper- 
ture, and abruptly rounded in to the umbilicus, but otherwise regularly 
convex; aperture subovate in outline, angular at its proximal end, 
straight upon its inner side; the straight inner lip thin, its edge rang- 
ing in line with the axis of the shell, so curved laterally as to give con- 
tinuity to the narrow umbilicus almost to the proximal extremity of the 
last volution; outer lip sinuous, its notch smalland shallow, situated at 
about the middle of the prominent convexity of the lip; revolving band 
narrow and somewhat obscure. Surface marked by numerous slightly 
impressed revolving lines, which are more distinct upon the proximal 
than upon the distal side of the spiral band, and still more distinct 
within and upon the borders of the umbilicus; spaces between the de- 
pressed lines narrow, plain, and somewhat unequal in width. 
Full length, 88 millimeters; length of aperture, 50 millimeters; breadth 
of the same, 49 millimeters; full diameter of the last volution, inciuding 
aperture, 75 millimeters. 
This large, fine shell differs too materially from any of the numerous 
forms of Pleurotomaria that have been obtained from the Carboniferous 
strata to need detailed comparison. 
Position and locality. Cval Measure limestone, Kansas City, Mo., where 
it was obtained by Prof. G. C. Broadhead, and in whose honor the spe- 
cific hame is given. 
PLEUROTOMARIA NEWPORTENSIS (Sp. noy.). 
Plate 42, figs. 2 a and b. 
Shell of medium size; spire moderately short, less in height than the 
vertical diameter of the aperture; volutions about five, regularly and 
prominently convex from suture to suture, gradually increasing in size ; 
the last volution continuously rounded from the suture to the axial 
center; aperture subcircular in outline, its margin oblique; outer lip 
having a broad notch a little above its middle, at the bottom of which 
the spiral band ends; inner lip apparently thickened; spiral band 
consisting of an elevated, narrow, roughened ridge, which is either 
wholly or partly obscured upon the volutions of the spire by the subse- 
quent volutions. Surface marked with numerous, somewhat irregular, 
raised revolving lines, the concave spaces between which are somewhat 
wider than the lines. 
xtreme height of the shell, 39 millimeters; height of aperture, about 
25 inillimeters; transverse diameter about the same; extreme transverse 
diameter of the shell, 39 millimeters. 
This shell resembles P. carbonaria Norwood & Pratten, but it differs 
in having its revolving band simple and raised instead of concave, with 
revolving lines within it, as in that species; and also in having its aper- 
ture subcireular instead of nearly semicircular. 
Position and locality.—Coal Measure strata, Newport, Ind., where it 
was obtained by Mr. William Gurley. 
