_ “nstriction on that side near the front. 
pee 
W. B. Dwight—Fossile of the Wappinger Valley. %'T 
ellipticity of three to one, much greater than that indicated in 
ure 
Siphunele lateral, but probably not marginal, circular, with 
a diameter of a little less than a millimeter (zz inch), where 
the shell has a diameter of 6:3"™, Locality—Calciferous, one 
or two specimens at Ledge D, but chiefly at locality F, Roch- 
dale, N. Y. i 
I have thought it proper to give these graceful orthocerata a 
Specific name in honor of Mrs. Henrietta Manning of New 
ork City, since her generous contributiorg toward the ex- 
Penses of developing this field of paleontological research have 
much facilitated the work and have constituted her a patron of 
Science, 
Oncoceras vasiforme, n. sp. 
Figs. 10 and 10a. 
aye vertical section, nearly, but not quite, at right angles 
with the dorso-ventral axis. ‘Shell small and delicate (4° in 
length and gmm maximum width), amount of curvature Un- 
and gently ; one margin in the vertical section exhibited, is 
°0Vex externally throughout to the aperture, the sh 
‘8 Convex for about one-half the distance and sees ae % ae 
changes into a gentle‘concave line, showing a special Dut sig ae 
