337 



LrcH 



Lichas breviceps, Hall. (Trans. Alb. Inst., 1863; 28th Rt. 



iND. IBS 



Pi. 36. 



St. Mus. 1879, etc.) Figures taken from Collett's Indiana Re- 

 port of 1881, p. 343, plate 34, fig. 1, upper surface of imperfect 

 head ; 1 a, enlargement of surface of glabella ; 2, profile of same 

 to show elevation of glabellar lobe ; 3 enlargement of the eye ; 

 4, imperfect body (thorax) and tail (pygidium) restored in out- 

 line ; 5, under surface of large imperfect tail, showing striae of en- 

 folded border; 7, central portion of large glabella. Surface of 

 animal, marked by pustules, and a few short hollow spines. 

 Resembles the Cincinnati (Hudson river) blue shale trilobite 

 Lichas {Platynotus) trentonensis^ but the head is shorter and 

 the tail broader and with straighter end border. — Niagara^ Vh, 



Lichas grandis. See Terataspis grandis. — VI L 



22 



