466 
PALAEONTOLOGY OF NEW YORK. 
striate. Anterior to the cincture tine surface of the shell is marked by fine 
granules or minute pustules. 
Three specimens measure respectively 3,3, 62 and 105 mm. in length, and 
13, 22 and 30 mm. in height. 
As compared with C. elongata, the shell is more distinctly recurved, the cinc¬ 
ture is stronger and the granulose striae are finer. It differs from all other 
species in the strong irregular concentric undulations on the body of the shell. 
Formation and localities. In the Hamilton group, at Sherburne, Pratt’s falls 
and Delphi ; and on the shore of Canandaigua lake, N. Y. Mr. Conrad cites 
the species from near Smyrna, Chenango county, N. Y. 
ClMITARIA ELONGATA. 
PLATE LXXVII, FIGS. 5-8. 
Cypricarelites elongatus, Conrad. Geol. Suvv. N. Y., Ann. Rep., p. 51. 1841. 
Cimitaria elongata (Conrad), Hall. Prelim. Notice Lamellibranchiata, 2, p. (19. 1870. 
“ “ “ “ Pal. N. Y., vol. v, pt. 1. Plates and Explanations: PI. 77, figs. 5-8. 
1883. 
Shell below the medium size, as compared with other species of the genus, 
sub-ensiform ; length about two and one-half times the height; basal margin 
gently curved, slightly sinuate anterior to the middle. Posterior extremity 
obliquely truncate above. Cardinal line essentially straight. Anterior end 
short, obliquely truncate from the beak, abruptly rounded below. Lunule 
very long and sharply defined. 
Valves depressed-convex in the lower and posterior portions, and gibbous 
in the umbonal region. 
Beaks sub-anterior, prominent, appressed and incurved. Umbonal slope 
obtusely sub-angular, extending to the posterior extremity. Post-cardinal 
slope concave anteriorly, and becoming flattened at the posterior extremity. 
Cincture a broad undefined depression, extending from the beak to the base 
of the shell, giving a slight sinuosity to the margin. 
Surface marked by fine concentric strim, which are somewhat irregularly 
fasciculate, especially on the anterior and posterior portions of the shell. 
