94 MALONE JURASSIC FORMATION OF TEXAS. [bull. 266. 
Natica INFLECTA Sp. 11. 
PI. XX, figs. 11, 12. 
Shell of medium or rather small size in its genus, smaller than 
X at tea williamsi, consisting of about 5 whorls, imperforate, of rather 
stout or medium elevated habit; the spire not concave, much more 
elevated than that of the above-mentioned species, its height being 
about two-fifths of that of the shell, composed of convex, well-rounded 
whorls, separated by sutures which are deeply and rather suddenly 
impressed, a narrow upper border of the whorls being gently and 
subhorizontally flattened; aperture narrow, or elevated, considerably 
less so. however, than that of X. williamsi, narrowly rounded below, 
obtusely pointed above; columella slightly produced, inner lip and 
spindle callus-plated; surface smooth or crossed only with ordinary 
growth lines. 
Measurements. — Height, 35 mm.; breadth, % 27 nun.; height of 
spire, 14 mm. A second example has dimensions about 75 per cent 
greater. 
Occurrence. — A mile and a half east of Malone station; with 
Xiiticii williamsi, from which the species is readily distinguished. 
The writer obtained only three shells of X. inflecta, one of which, a 
young example, has the body whorl crossed with alternating dark and 
light bands, parallel with the growth lines. An example was ob- 
tained by Doctor Stanton at the same 1 locality, and one by him in foot- 
hills at the northwest end of Malone Mountain, about 2 miles east- J 
southeast from Finlay station. 
The species seems to stand close to the English Oxfordian form, .V. 
urtjutii Phil., and is referred to the subgenus Aniauropsis, to which 
all of the Xatica 1 now known from the Malone formation seem to 
belong. 
Natica fix la yen sis sp. n. 
PI. XX. ti^'s. 15, 16. 
Shell of medium size in its genus, subovate, imperforate; whorls 
about 5. moderately convex, those of the spire broad and low; body 
whorl large, elevated, oblique; spire more than a third and consider- 
ably less than half of the height of the shell, higher than the spire of 
Natica williamsi, lower than that of X. inflecta; suture much more 
strongly impressed than that of the former and much less so than that 
of the latter species; aperture elevated, arcuate-pyriform, pointed 
above, rounded below; inner lip not free-margined, and apparently 
with little callus, concave below, convex above; surface plain. 
Mcasureinents. — Height (approximately), 42 mm.; breadth, 
30 mm. 
