SOME NEW DEVONIC FOSSILS ^ l6l 



Hall and D. 1 i m u 1 u r u s Conrad of the Niagaran, of which a 

 simple, well lobed structure of the glabella is an accompaniment. 



This species has been observed in several examples, has a rather 

 short cephalon in which the glabella is subpentagonal, the dorsal 

 furrows not deep and rather obscure at the outer ends, the frontal 

 lobe highly transverse, right short, and merging directly into the 

 frontal extension. The glabellar furrows are very obscure, the 

 first and second lobes but ill defined, slightly swollen and club- 

 shaped but the third lobes are linear and are better defined. Eyes 



Dalmanites gaveyi 



comparatively small and not sulcate at the base, cheek spines very 

 narrow and produced. The cheeks slope somewhat abruptly to 

 a thickened and rounded edge without border. The surface is 

 marked by no noticeable pustules but by a fine granular ornament. 

 This is a very distinctive and rather rare type of structure ex- 

 pressed not so much in the frontal projection as in the somewhat 

 swollen aspect of the glabellar lobes and the obsolescence of the 

 furrows, as well as the smoothness of the surface. 



Dimensions. Length 12 mm, width 23 mm. One of the speci- 

 mens carries a considerable part of the thorax but the pygidium 

 of this species is not yet identified. 



Lozver Devomc. Grande Greve, P. Q. 



Dalmanites ploratus nov. 



There is a group of tuberculated dalmanites in the early Devonic 

 rocks, embracing D. dentatus Barrett (which the ornament of 

 the cephalon shows to be a Corycephalus), from the Port Jervis 

 Oriskany, the allied D. bisignatus Clarke and D. phacoptyx 

 H. and C. from the Becraft mountain Oriskany. Of the 

 last two the pygidium of the former is a shield of slender propor- 



