PLATE IX. 



Dalmanites (Chasmops) anchiops. 



Page 59. 



See Plato 10. 

 Fig. 1. A small cephalon, preserving: the normal proportions, but denuded of must of the crust. 



Schoharie grit. Schoharie, Schoharie county. 

 Pig-. ■!. A cephalon of average size, a cast of the interior. 



Pig. 3. Profile view of the same specimen, showing the convexity of the glabella and the length ami 

 direction of the occipital spine. 



Schoharie grit. Schoharie, Schoharie county. 

 Fig-. 4. A small lint quite perfect cephalon. retaining the crust, showing the true proportions and the 

 coalesced glabellar lobes. The specimen is enlarged to two diameters. 

 Profile view of the same, showing the elevation of the occipital spine. 

 The right eye of the same enlarged to three diameters. 

 Schoharie grit. Schoharie county. 

 10. An imperfect cephalon, with unusually long genal spines ; referred with doubt to this species. 

 Schoharie grit. Schoharie county. 

 The thorax and pygidium. drawn from a gutta-percha impression of a natural mould. 



Schoharie grit. Schoharie, Schoharie county. 

 The type of Dr. Green's description. This specimen is the only one yet observed retaining all the 

 parts in juxtaposition, but the crust is for the most part wanting, and the occipital and caudal 

 spines are broken away. 



Schoharie grit. Ulster county. 



Dalmanites (Chasmops) anchiops, var. armatus. 



Page 62. 

 See Plate 10. 

 Fig. 7. An imperfect cephalon, showing the long occipital spine. 



Schoharie grit. Schoharie county. 

 Fig. S. A very large cephalon, slightly unsymmetrical, showing the occipital spine and the obtuse genal 

 angles. 



Schoharie grit. Near Clarksville, Albany county. 

 Pig-. 9. A fragment of the cephalon, showing the occipital spine. 

 Schoharie grit. Schoharie, Schoharie county. 



Dalmanites (Chasmops) anohiops, var. sobrinus. 



Page 62. 

 Pig. 11. A cephalon. showing the semicircular outline, convex glabella and obtuse genal extremities. 

 Schoharie grit. Schoharie, Schoharie county. 



