500 
PALAEONTOLOGY OF NEW YORK. 
The specimen described lias a length of 57 mm. and a height of 22 mm. 
This species is distinguished from G. lingualis in its more elongate form, nar¬ 
rower anterior end and by the convexity of the umbonal slope continuing to 
the post-inferior extremity. 
Formation and locality. In a micaceous red sandstone of the Chemung group, 
at Mansfield, Tioga county, Pa. 
Glossites subnasutus, n. sp. 
PLATE XCVI, FIG. 14. 
Shell of medium size, elongate-sub-elliptical; length more than twice the 
height; basal margin gently curved, nearly straight in the middle. Poste¬ 
rior extremity produced and sub-nasute below, curving forward above to the 
hinge-line. Cardinal line gently arcuate, about half the length of the shell. 
Anterior end declining from the beak and narrowly rounded. 
Valves depressed-convex below and posteriorly, becoming convex in the 
middle and above. 
Beaks at about the anterior sixth, directed forward, low and appressed, 
rising but little above the liinge-line. Umbonal slope convex, continuing to 
the post-inferior extremity, and producing a sub-nasute extension of the 
margin. 
Surface marked by fine concentric striae, which are often fasciculate, and 
sometimes produce regular undulations of the surface on the umbo. 
Two specimens measure respectively 44 and 38 mm. in length, and 18 and 
16 mm. in height. 
This species is distinguished by the nasute extension of the post-inferior 
extremity, in which character it differs from any other species here described. 
Formation and locality. In a sandstone of the Chemung group, at Mansfield, 
Tioga county, Pa. 
