498 ' PALEONTOLOGY OF NEW YORK. 
Glossites ellipticus, n. sp. 
PLATE ACVI, FIG. 8. 
Shell above the medium size, elongate-elliptical; length more than twice the 
height; basal margin very gently curved, nearly straight in the middle. 
Posterior extremity narrowly rounded, extending obliquely forward above to 
the hinge-line. Cardinal line gently arcuate. Anterior end obliquely trun¬ 
cate above by the long lunule, and abruptly rounded below. 
Valves depressed-convex in the lower and posterior portion, becoming con¬ 
vex in the middle and umbonal regions. 
Beaks at about the anterior fifth, small and closely appressed, rising but 
very little above the hinge. Umbonal slope moderately convex above, not 
defined toward the post-inferior extremity. 
Surface marked by fine concentric strise, which are fasciculate on the 
body of the shell, producing somewhat regular undulations. Interior 
unknown. 
The specimen described has a length of 59 mm. and a height of 25 mm. 
This species is distinguished by its regular elongate-elliptical form. The 
specimen, forming the basis of the description, retains both valves and preserves 
the hinge ligament. The ligament is strong and extends backward from the 
beaks about 19 mm. 
Formation and locality. In a fine-grained sandstone of the Chemung group, 
at Mansfield, Tioga county, Pa. 
Glossites rudicula, n. sp. 
PLATE XCVI, FIG. 17. 
Shell of medium size, elongate-elliptical, wider behind the middle ; length more 
than twice the height; basal margin gently curved in the posterior portion, 
becoming nearly straight anterior to the middle. Posterior extremity nar¬ 
rowly rounded, with the upper margin extending very obliquely forward to 
the hinge. Cardinal line slightly oblique and gently arcuate. Anterior end 
narrow, sloping rapidly from the beak and abruptly rounded at the extremity. 
