lyo NEW YORK STATE MUSEUM 



of these parts, due in large measure to the difificulty of extracting 

 them from the rock. 



Dimensions. The largest of the specimens affords the following 

 measurements : Probable entire length to top of axial spine, 90 mm ; 

 length of posterior glabellar spine (not restored) 41 mm; on the 

 curve, 55 mm; greatest vertical hight of anterior spines (not 

 restored) 30 mm; length of lateral occipital spines, 27 mm; vertical 

 hight of spine on cheek, 30 mm. These figures indicate that the 

 species is one of the largest as well as the most extravagantly orna- 

 mented of all forms of Lichas. It is surpassed in dimensions only 

 by Terataspis grandis and Uralichas ribeiroi, 

 the lords of this tribe. Equipped with cerements of mortality, 

 successors of this genus Gaspelichas are not to be expected. 



Lower Devonic. Grande Greve, P. Q. 



Lichas bellamicus nov. 



This is a species of medium dimensions having the lobation of 

 cephalon and the outline of the pygidium very similar to the cor- 

 responding parts in the prevalent forms of Lichas from the Helder- 

 bergian. 



The frontal lobe is pyriform, not elevated or bombate but uni- 

 formly convex, without abrupt posterior slope; the lateral furrows 



Lichas bellamicus 



are deep and the converging lateral lobes elongate, of about equal 

 width throughout and divided only by an extremely faint cross 

 furrow. The grooves dividing these outer glabellar lobes forming 

 the fixed cheeks are very shallow, and these cheeks are convex 

 and elongated about the eye lobes. The cephalon appears to be 

 bounded by a smooth margin which is flat in front. The entire 

 surface except the furrows is coarsely tubercled and it would 



