138 NEW YORK STATE MUSEUM 



NOTES ON THE ORISKANY FAUNA AT HIGHLAND MILLS 

 Autodetus beecheri Clarke 



Plate 32, figures i, 2 



See N. Y. State Mus. Mem. 3. 1900. p. 26, pi. 2, fig. 27-32 



This species was described from the Oriskany of Becraft mountain. 



Tentaculites elongatus Hall 



Plate 32, figure 8 



An Oriskany species, very abundant in these strata and characterized 

 by its simple regular annulations covered with fine concentric lines. 



Coleolus acus Clarke 



Plate 32, figures 9-15 



Tentaculites ? acus Clarke. N. Y. State Mus. Mem. 3. 1900. p.28, pi. 3, fig. 1-7 



This shell is represented by long, slender straight or gently curved 

 cones bearing closely appressed oblique concentric striae on the surface. It 

 occurs also in the Oriskany of Becraft mountain. 



Phacops logani Hall 

 A few heads and tails only. 



Dalmanites emarginatus Hall 



Plate 32, figure 3 



This species, based upon a fragment from the Schoharie grit of a 

 pygidium of about the same size and character as that here figured, was 

 subsequently found in more complete preservation in the Grande Greve 

 limestones. [See this memoir, pt i, p. 127, pi. 7, fig. 2, 3] 



Pleurotomaria haedillus nov. 



Plate 32, figures 32-38 



Shell with depressed uniformly sloping whorls and rather shallow 

 sutures, the general form being but slightly turriculate and the total hight 

 less than the basal width. The slit band is conspicuous and elevated on all 

 whorls above the suture. The evenly sloping upper surface of the whorls 

 bears a series of uniform equal ridges or elevated lines concentric to the 

 stoma which on the lower surface of the body whorl are curved or inter- 

 rupted by one or more low revolving lines. The style of ornament in this 

 species is not greatly unlike that in P. capillaria Conrad of the Ham- 

 ilton shale fauna, though differences are apparent in the less frequently 

 interrupted and knotted revolving lines, the depressed surface and greater 



