EARLY DEVOXIC HISTORY OF XEW YORK AND EASTERN NORTH AMERICA 1 37 



Lichas bellamicus nov. 



Plate 3, figures 5-7 



This is a species of medium dimensions having the lobation of cephalon 

 and the outhne of the pygidium very similar to the corresponding parts in 

 tlie prevalent forms of Lichas from the Helderbergian, 



The frontal lobe is pyriform, not elevated or bombate but uniformly 

 convex, without abrupt posterior slope ; the lateral furrows 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 appear 

 that some of the tubercles at the crest of the frontal lobe are extended into 

 thick spinules. Parts of a pygidium indicate that this organ was flat and 

 extended and the margin carried long flat spines. 



The similarity of this species to Lichas bigsbyi of the Helder- 

 bergian is seen in both glabella and pygidium, though the former does not 

 here become conate as in L. bigsbyi. We have elsewhere noted the 

 fact [Pal. N. Y. 8 : 80] that it is probably to L. bigsbyi that the pygidia 

 appertain which are figured in Palaeontology of New York, v. 3, as belong- 

 ing to L. pustulosus. The concurrence in the Grande Greve strata of 

 pygidia and cephala of like structure to these would seem to substantiate 

 this arcrument. 



Localities. In the cherty strata between Grande Greve and Little 

 Gaspe. 



Lichas (Gaspelichas) forillonia nov. 



Plate I, figures i, 2; plate 2, figures i 3; plate 3, figures 1-4 



The limestones of Grande Greve contain a Lichas of large proportions 

 and extravagantly spinous. The several parts we have found are, on 

 account of the great spines, intricately complicated with the matrix and it 

 has been possible to extricate them only at the cost of infinite labor and 

 patience. The species is not common and our specimens represent three 

 cranidia with separated cheeks. The general type of cephalic structure irre- 

 spective of the spines is practically that normal to such typical expressions 

 of Lichas as seen in Arges, Ceratolichas, Hoplolichas and Conolichas, the 

 frontal lobe being large, ovoid and prominent, not set off by deep lateral 

 grooves as in Terataspis but most prominently elevated posteriorly. The 

 lateral lobes are long and narrow, subcrescentic in form and but very 

 slightly elevated so that the surface between the dorsal furrows is low, 

 gently convex and very long, terminating posteriorly in a more elevated tri- 



