Welter — Kinderhook Faunal Studies. 103 



terior margin abruptly rounded below, truncated above, 

 meeting the hinge-line at an obtuse angle. Beaks nearly ter- 

 minal, prominent, flattened, slightly incurved; umbonal ridge 

 slightly arcuate, the dorsal slope concave, the ventral slope 

 moderately convex. Greatest convexity of each valve on the 

 umbonal ridge a little back of the beak. Surface marked by 

 six to eight strong imbricating concentric ridges. 



Glossites elliptica (Win.). 



PI. IV. f. 6. 



Edmondia elliptica. Bull. U. S. G. S. No. 153: 242. 



"Shell rather large, appressed, transverse, with an elongate- 

 elliptical outline. Beaks flat, inconspicuous, situated one- 

 fifth the shell-length from the anterior end. Hinge margin 

 elongate, slightly curved, abruptly elevated; a flattened area 

 extending from the beaks backward to the posterior hinge 

 angle. Extremities neatly rounded. Surface marked by 

 numerous distinct unequal lines running parallel with the 

 pallial margin. Length, 34 mm., height, 16 mm." 



Remarks. This species is represented by a single specimen, 

 the type, which is only an imperfect impression in the sand- 

 stone. The figure is drawn from a wax impression taken 

 from this specimen, the probable outline of the shell being 

 indicated. It was originally described as Edmondia, but in 

 all the characters preserved it more closely resembles the 

 illustrations of Glossites and is therefore transferred to that 

 genus. It is perhaps more closely allied to G. depressus 

 Hall * from the Chemung in New York, than to any other 

 species of the genus. 



Glossites? burlingtonensis n. sp. 



PI. IV. f. 11. 



Shell subelliptical in outline, moderately convex, com- 

 pressed toward the posterior extremity; length, 28 mm., 

 height, 13 mm. Hinge-line nearly as long as the shell; 

 anterior margin abruptly rounding into the hinge-line above, 

 regularly curving below into the ventral margin ; ventral 



Compare Pal. N. Y. 5 1 . pi. 40. f. 17. 



