REPORT OF THE STATE PALEONTOLOGIST I9O3 261 



G-rammysia sp. no v. 

 One imperfect specimen of a Grammysia from the Trilobite ledge 

 (Lower Oriskany) indicates a close relationship to G. u n d a t a of 

 the Chemung group. It agrees with it in size and surface markings 

 as far as these are preserved but differs from that species in that the 

 hinge line anterior to the umbone has a greater extension and that 

 the convexity of the shell posterior to the cincture is decidedly 



^ * Nuculites barretti sp. nov. 



Shell outline characterized specially by an abrupt downward 

 curving to the hinge line posterior to the beak and by an oblique 



Fig. y, 10. Nuculites barretti Shimer. X2 



truncation anterior to the hinge line, as well as by the navicular 

 curve of the base. Beaks separated by an area of medium width. 

 Dentition taxodont, apparently multivincular. Anterior to the 

 beak is a radial buttress^ extending from the hinge line downward 

 and slightly forward about one third of the distance to the base of 

 the shell. The internal molds from which this description is made 

 show on the umbone a slight depression running parallel to the 

 radial buttress. An undefined sinus gradually broadening extends 

 from the hinge line to the posterior basal extremity. 



Three specimens measure in length and higlit respectively, 19mm 

 by 8mm, 20mm by 12mm (imperfect), i6mm by lomm (imperfect). 



This species, which is from the Upper Oriskany, more closely re- 

 sembles in external characters Clidophorus cuneatus 

 Hall of the Upper Ordovician^ than any other species with whose 

 description we are familiar. It differs specially, however, from 

 C. cuneatus in being more elongate in proportion to its hight, 

 in the more central location of the beaks and in the abrupt down- 

 ward curving to the hinge line posterior to the beak. 



, ^On comparing the radial buttress of this species with that of M a c h - 

 faera costata, a recent shell abundant along the whole New Eng- 

 I land coast, we note that in the latter species it is perpendicular to the shell 

 I and also is narrowest at the hinge line, increasing in breadth as it fades 

 \ away, in this respect being just contrary to Nuculites barretti. 

 ' 'Can. Nat. & Geol. i860. 5:148. 



