EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA gj 



by Kloden [ Verst. d. Mark Brandenburg] and Reuter [Zeitschr. d. deutsch. 

 geol. Gesellsch. 1885. v. 37J. Among those, the simple form of these 

 specimens is not to be found. The object from the Tilestones figured 

 under this name in Siluria and the Silurian System may have some rela- 

 tion to that species but the Chapman Plantation forms are quite distinct. 

 These on the Presque Isle agree very well with Jones's B. kloedeni 

 van acadica from the Lower Devonic at Stewart's cove, Dalhousie, 

 N. B. Beyrichia kloedeni as interpreted by Jones and other 

 writers is a species of very wide range occurring even as high up as 

 the Carbonic. Some of the specimens from the Presque Isle with hyper- 

 trophied lateral lobe can not be separated from the B . kloedeni var. 

 from the Onondaga limestone of Ontario county, N. Y., figured by Jones 

 in the Quarterly Journal of the Geological Society, volume 46, plate 21, 

 figure 1 a, 1890. 



Locality. Presque Isle stream. 



Beyrichia oculina Hall 



Beyrichia oculina Hall. Palaeontology of New York. 1859. 3:378 



The simple subcentral well defined tubercle of this species and its 

 undivided lateral and ventral lobes, as well as its subequilateral outline are 

 index characters presented by some of our specimens. There is no occasion 

 to confound the species with that from Presque Isle stream. Beyrichia 

 oculina was described from the Coeymans limestone (Helderberg) of 

 New York. 



Locality. Edmunds Hill. 



Orthoceras norumbegae Clarke 



Plate 2J, figures 14, 15 



Orthoceras norumbegae Clarke. N. Y. State Mus. Bui. 107. 1907. p. 177 



A robust shell of which we have about six inches of the final part, 

 retaining the surface sculpture. The shell seems to have tapered gradually 

 and to possess a circular section. The fragment at hand has a length of 

 165 mm, a width at the top of 75 mm, at the bottom of 60 mm. The sculp- 

 ture consists of incised vertical lines at irregular intervals, making very flat 

 and low elevated striae, some broad, some very narrow and threadlike, all 

 rather wavy and irregular in their course, large and small interspaced with- 

 out order. At wider intervals are deeper longitudinal sulci. All are 

 crossed by faint and irregularly distributed concentric lines. This style of 

 exterior is highly unusual and quite peculiar. 



Locality. Edmunds Hill. 



