LAMELLIBRANCHIA TA. 
501 
Glossites patulus, n. sp. 
PLATE XCVI, FIGS. 15, 16. 
Shell of medium size or larger; length less than twice the height; basal mar¬ 
gin gently curved posteriorly, becoming nearly straight anterior to the mid¬ 
dle, Posterior extremity abruptly rounded below, and obliquely sub-truncate 
above. Cardinal line depressed, oblique, and gently arcuate. Anterior end 
obliquely truncated by the lunule and narrowly rounded below. 
Valves depressed-convex in the lower and posterior portions, becoming 
moderately convex in the umbonal region. 
Beaks at the anterior fourth or fifth, small and closely appressed. Umbo¬ 
nal slope convex above, becoming depressed toward the post-inferior 
extremity. 
Surface marked by fine striae of growth, which are fascicled and produce 
concentric undulations on the body of the shell. Anterior muscular scar 
moderately impressed, situated just within the anterior border below the 
lunule. 
Four specimens measure respectively 28, 36, 45 and 50 mm. in length, and 
17, 20, 25 and 28 mm. in height. 
This species is distinguished by its broad, flattened form, in which characters 
it differs from any other species of the genus noticed in this volume. 
Formation and localities. In the Chemung group, at Rockville, N. Y., and 
Mansfield, Pa. 
Glossites amygdalinus. 
PLATE XL, FIGS. 13, U. 
San\g winolites amygdalinus, Winchell. Proc. Acad. Nat. Sci., Phila., p. 13. 1S63. 
In part Modioinorpha ? amygdalina (Winchell), Hall. Prelim. Notice Lamellibranchiata, 2, p. 78. 1870. 
“ “ “ “ “ Pal. N. Y., vol. v, pt. 1. Plates and Explana¬ 
tions : PL 40, figs. 12-20. 1883. 
Shell below the medium size, sub-elliptical; length a little more than twice the 
height. Basal margin gently curved, abruptly rounded into both extremi- 
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