164 NEW YORK STATE MUSEUM 



is rather finely pustulose especially on the cheek spines. The 

 thoracic segments show no features that can be regarded as dis- 

 tinctive. 



Pygidium. Elongate, subequally triangular, subacuminate, of 

 the general type ofD. micrurus and less like the nodose surface 

 with long tail spine characterizing D. (Probolium) nasutus. 

 Axis relatively narrow, segments 10 to 12. Pleural ribs 9 to 10, 

 flat above, grooved by a fine line and separated from each other 

 by rather narrow furrows. Caudal termination a broad and short, 

 acute and slightly upturned spine. Surface finely granulose on 

 the ribs and along the margins with obscure evidence of low faint 

 nodes. 



Dimensions. The average of our specimens indicates a length 

 of cephalon not including the snout, of 30 mm, a width of 63 mm. 

 In such a specimen the snout would have a length of 16 mm with 

 a spread from tip to tip of the lateral spines of 12 mm. An aver- 

 age pygidium measures 36 mm in length and 42 mm in width. 



Lozver Devonic. Perce rock and Blowhole cliffs, P. Q 



Dalmanites (Probolium) esnoufi no v. 



A quite imperfect cephalon in general features has the aspect 

 of the shields referred to D. micrurus Green, the border being 

 broad, flat and smooth at the edge, the frontal lobe of the glabella 

 transverse and rather narrow, the other lobes quite small but the 



Dalmanites (Proboliu m) esnoufi 



first two lobes are fused at the outer edges. The genal spines are 

 produced, the eyes furrowed at their base and the groove within the 

 border is conspicuous. The border in front is produced into a 

 bifurcate process, the branches of which are flat, very divergent 

 and rise from a broad base. 



