Wetter — Kinderhook Farmed Studies. 93 



from the other three, and this specimen is undoubtedly the 

 type of the species and is here illustrated. It is apparently to 

 be referred to the genus Grammy sia. It resembles G. 

 hannibalensis but is a smaller, longer, and more slender 

 shell. It also differs in the same manner from G. plena H. 

 with which it is associated, but the difference is even more 

 striking. Hall * has identified a shell from the "yellow sand- 

 stone " at Burlington with this species of Winchell's, refer- 

 ring it to the genus Glossites. This shell, however, is quite 

 distinct from Winchell's type of the species and is probably 

 identical with the species described by him as Edmondia 

 elliptica which is transferred to the genus Glossites in the 

 present paper. The generic position of the three specimens 

 associated with the type of the species is somewhat uncertain, 

 but they certainly constitute an undescribed species which 

 possibly should be referred to the genus Glossites, though they 

 are distinct from the species identified as G. amygdalinus by 

 Hall. 



Edmondia burlingtonensis W. & W. 



Pl.IV.f. 1-2. 



" Shell of medium size, broadly subelliptical in outline, with 

 regularly ventricose valves, breadth equal to three-fifths of 

 the length. Beaks situated within the anterior third, strong, 

 prominent and incurved. Hinge-line and basal margin gently 

 and equally curved ; anterior and posterior extremites broadly 

 and equally rounded. 



" Surface marked by numerous strong, concentric undula- 

 tions, parallel to the margin of the shell. In full-grown in- 

 dividuals there is a shallow, undefined sulcus, commencing 

 near the center of the shell, and reaching the border near the 

 middle of the basal line." 



Remarks. The type specimens of this species are 

 seven in number, ranging in size from 10 mm. to 

 35 mm. in length. Two of the best preserved of these 

 are here illustrated. The specimens figured by Hall were 

 not the type specimens, and show some slight variation 



* Pal. N. Y. 5 1 : 501. pi. 40. f. 13, 14. 



