EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA 139 



size. It is one of the rarer species in the fauna, and forms of this type have 

 not been observed in the Oriskany elsewhere. 



Eotomaria hitchcocki Clarke 



See p. 100, pi. 23 



This shell, described from the Chapman sandstone of Presque Isle 

 stream, Aroostook co., Me., is represented here by a small form with 

 broadly conical regular shape, sloping whorls, slightly thickened and pro- 

 tuberant at the sutures. It is not common. 



Tropidocyclus brevilineatus (Conrad) 



Plate 32, figures 4-7 

 See pt i, p. 229, pi. 17, fig. 7-16 



I have identified in the Gaspe sandstone the Bellerophon brevi- 

 lineatus Conrad as described by Hall from the middle Devonic (Moscow 

 shale) of New York. There is a difference between the Gaspe shell and 

 those illustrated here in the apparent entire absence of the interrupted 

 revolving lines so noticeable in the latter. The shells are very closely 

 allied in all other details of structure and at Highland Mills the species is 

 extremely common. 



Tropidocyclus rotalinea (Hall) 



Plate 32, figures 23-26 

 See pt i, p. 229, pi. 17, fig. 3-6 



This second species described from the Hamilton shales of New York 

 was also identified by me in the Gaspe sandstone. The Highland Mills 

 specimens are fully comparable with representatives of the species from the 

 two horizons cited. It is a noteworthy fact that these two species which 

 lent their evidence to confirm the middle Devonic character of the Gaspe 

 sandstone fauna should now appear in the Oriskany of New York. 



Phragmostoma nitela nov. 



Phite 32, figures 27-31 



Broadly incurved, body whorl thimble shaped, stoma explanate in full 

 growth but quite usually not greatly expanded. Inner whorls buried in a 

 callus which forms a flat transverse platform on the inner lip. Outer sur- 

 face of body whorl often with a broad rather indistinct elevated band near 

 the stoma. Surface as usually preserved, with fine elevated and unequally 

 spaced revolving lines crossed only by the irregular growth wrinkles. The 

 slit band with its retrally curved lines is sometimes well defined but often 

 obscured in later growth. This is an unusual type of shell from the early 

 Devonic but a parallel occurrence of this genus is the Phragmostoma 

 d i o p et e s of the Moose River sandstone [see p. 70]. 



