154 PALAEONTOLOGY OT NEW-YORK. 



Position and locality. This shell, which is more abundant than any other of the order, 

 occurs in the central and higher part of the Trenton limestone at Middleville, Trenton 

 Falls, Herkimer, and other places. 



195. 5. TELLINOMYA ANATINIFORMIS ( ?(. sy;.). 



Pl. XXXIV. Fig. 7. 



Oblong, subelliptical, slightly inequilateral ; umbones little elevated above the cardinal 

 line, which declines posteriorly ; anterior extremity rounded ; posterior narrower, sub- 

 truncated. On each side of the umljones is a shallow sinus or groove, extending obliquely 

 downward to the posterior and anterior ventral margin. 



The specimen has only a small portion of the shell remaining upon it, and its structure 

 cannot be so well ascertained, but it appears nevertheless to belong to this genus, though 

 deviating somewhat from the usual characters in the slight oblique fold upon each side of 

 the umbo. The partial truncation in front, and contraction of this part of the shell, are 

 characters common to several species of the genus. 



This is evidently a rare species, two specimens only having been seen. 



Position and locality. In the upper crystalline portions of the Trenton limestone at 

 Watertown, Jefferson county. Dr. Crawe. 



196. 1. CARDIOMORPHA VETUSTA («.^y>.). 



Pl. XXXIV. Fig. 8. 



Subrlioniboidal, gibbous, abruptly rounded anteriorly, sloping abruptly from the posterior 

 cardinal extremity ; umbones nmch elevated, nearly over the anterior extremity ; stuface 

 marked by strong concentric ridges, with small depressions of equal width between. 



This species is only represented by a single imperfect specimen, which is well exhibited 

 in the figure. The specimen has suffered slightly from compression, and the umbones were 

 probably higher originally than they now appear. 



I have referred this species to Cardiomorpha of de Koninck, from its analogy in form 

 (o some species of that genus, not having had an opportunity of learning the essential 

 characters on which it is founded. I believe this genus, as well as Edmondin , has been 

 constitutt'd by M. de Koninck for the reception of several Carboniferous species, and it 

 may perhaps be found to preclude tiiose of lower Silurian epochs. 



Position and locality. In the central part of the Trenton limestone, in thin shaly layers. 

 Middleville, Herkimer county. 



