36 
PALAEONTOLOGY OF NEW YORK. 
carinate ridges, of which two or three are visible on the upper volutions, 
and about five on the body-whorl; those on the upper side of the volu¬ 
tion more distant than those on the lower side. 
Surface marked by fine, closely arranged striae of growth, which are sometimes 
crowded in fasciculi, giving gentle inequalities; these striae are directed 
a little backward from the suture. 
The larger specimens are about an inch in diameter, with a height about 
one-fourth greater. The prevailing forms are about three-fourths of an inch 
high. 
Formations and localities. In the coarse sandy shales of the Hamilton group, 
in Chenango and Madison counties, N. Y. 
Cyclonema multilira. 
PLATE XII, FIGS. 30-33. 
Cyclonema multilira. Hall. Descriptions of New Species of Fossils, etc., p. 20. 1861. 
“ “ “ Fifteenth Rep. N. Y. State Cab. Nat. Hist., p. 48, pi. 5, fig. 17. 1862. 
“ “ “ Illustrations of Devonian Fossils: Gasteropoda, pi. 12. 1876. 
Shell turbinate, ventricose. Volutions five or more; body-whorl very large 
and extremely ventricose,—its surface marked by fine concentric stria) 
of growth, which are directed backwards from the suture toward the 
periphery, and pass to the lower side of the volution without deviation, 
except in the slight undulation at the crossing of the revolving carinse. 
Surface of the volutions marked by strong, elevated, revolving lines or carime, 
of which there are about five or six upon the upper ones, and ten or 
twelve on the body-whorl; the space from the suture to the upper of 
these lines is greater than between the lines, those of the periphery being 
more closely arranged than those above or below. 
This species is similar in form to C. lirata , with the last volution more ven¬ 
tricose, and all the volutions less angular; the revolving carinate lines are 
twice as numerous and not so strong. It is intermediate between the C. Ham- 
