2IO NEW YORK STATE MUSEUM 



at Grande Greve specially above Fruin^'s and at Lehuquet's ; Cape Rosier 

 road at Bartlett's ; also at Indian Cove. Billings cites in addition, Little 

 Gaspe. 



A single example of the species has been found in the Gaspe sand- 

 stones on the Portage road near Gaspe Basin. This is a large gibbous ventral 

 valve with sharp plications one of which shows bifurcations, an unusual 

 condition but the shell seems to be in no essential particular unlike those 

 of the limestones. 



Chonetes sp. 



A rather small Chonetes with smooth exterior has been observed in a 

 few instances. These have a quite strongly and regularly convex pedicle 

 valve, widest on the hinge, with conspicuous umbo, abrupt anterior slope 

 and depressed lateral surface. The exterior is quite without indication of 

 markings. Old shells of C h. melonicus show an obsolescence of the 

 striae approaching a smooth condition and have somewhat the form of this 

 shell, but the specimens under consideration are always small. 



Dimensions. Width on hinge, 9 mm ; length 6 mm. 



Locality. At Fruing's, Grande Gr^ve. 



Chonostrophia complanata Hall 



Plate 46, figures 6-13 



Chonetes complanatus Hall. Palaeontology of New York. 1859. 3:418, 



pi. 93, fig. la-d 

 cf. Chonetes dawsoni Billings. Palaeozoic Fossils. 1874. v. 2, pt i, p. 18, 



fig. 8 

 Chonostrophia complanata Clarke. N. Y. State Mus. Mem. 3. 1900. p. 50, 



pi. 7, fig. 7-13 



The specimens identified with this species are rare in our collections 

 from the limestones, but the six representatives before us indicate that there 

 is no dependable difference between the shells and the New York Oriskany 

 species. In their rather small size they approach the form described by the 

 writer from the calcareous Oriskany of Becraft mountain, Columbia co. but 

 we are unable to find a distinction between those and the larger, more trans- 

 verse shells from the sandstone on which the species was founded. The 

 Grande Greve shells may be either transverse and relatively narrow, or 

 somewhat elongated on the anterior margin, and some bear a slight median 

 fold on the ventral valve with a tendency to sinuosity or irregular radial 

 growth on both valves. In the character of the surface striae we find the 

 chief basis for distinction from the Chonostrophia of the Gaspe sandstone 

 (C h. dawsoni). In the former the regular fasciculation of the striae is 

 palpable from early stages on, the finer lines between the larger striae 

 increasing by implantation and in this feature the shell agrees with C h. 



