1 62 NEW YORK STATE MUSEUM 



The characters of the hinge line cannot be made out from this specimen. It seems 

 however, to have had an external ligament. Just below the dorsal edge and parallel to it, 

 there is an obscure groove in the cast, indicating a tooth or a ridge on the shell. Surface 

 unknown. 



Locality mid formation. Grande Greve, Gaspe. No. 8. 



We present figures of the original and another specimen of this species 

 from Grande Greve. 



Schizodus ventricosus (Billings) 



Plate 23, figure lo 



Anodontopsis ventricosa Billings. Palaeozoic Fossils. 1874. v. 2, pt i, 

 P- 55, fig- 24, 25 



Original description. Strongly convex, ovate; hight about two thirds the length. 

 Anterior extremity with the most projecting point at a little over one third of the hight, 

 between which and the umbones the outline is gently concave. Ventral margin rather 

 strongly convex, deepest a little in front of the middle, more abruptly rounded up to the 

 anterior than to the posterior extremity. Umbones large, rounded; beaks closely incurved; 

 hinge line straight; the anterior extremity situated at about two thirds the hight; thence 

 sloping upwards and backwards to a point on the dorsal margin a little behind the mid- 

 length of the shell. Dorsal outline most elevated at the umbones, between which and 

 the extremity of the hinge line slightly concave. Posterior extremity most projecting at 

 about the lower third; above this point obliquely truncated, ascending to the extremity 

 of the hinge line with a gently convex slope. 



Judging from the cast of the interior, the ligament in this species is external. The 

 dorsal margin behind the umbones is sharp, slightly compressed, gently concave just 

 below the edge. 



Surface unknown. 



Length of the best preserved specimen collected, eighteen lines; hight at the 

 umbones, twelve lines; depth of both valves, ten lines. 



We have identified our specimens with Billings's species though they 

 are for the most part less convex and show more emphatically the aspect 

 of Schizodus. All are internal casts and not well preserved. 



Localities. Grande Greve and Indian Cove. 



Nuculites sp. 



Plate 24, figure ii 



We have observed at Grande Greve a single well defined internal cast 

 representing this genus but are reluctant to attempt a definition of its char- 

 acters. It is apparently unlike the common species of the Gaspe sandstone 

 and the genus is not found in the allied faunas of the Helderbergian and 

 Oriskany. 



Conocardium cuneus (Conrad) 



Plate 23, figure 3 



For description and illustrations see Hall, Palaeontology of New York. 1885. v. 5, pt r, p. 409, pi. 67, fig. 1-32 ; pi. 68, 

 fig. I, 4-16; pi. 94, fig. II, 12 



This common and characteristic species of the Onondaga limestone 

 and Schoharie grit of the Appalachian basin is present with well defined 



