PLATE LV 



FAOE. 

 ACANTHASPIS AEMATUS, Newb 37 



Fig. 1. Plate bearing spine, from left side of craninm 1 



2. Plate bearing spine, from rigiit side of cranium? 



3. Plate corresponding to flg. 2, from another Individual, showing the manliet in which the 



spine was .ioined to lihe esterior border. 



4. Under side of a plate generally similar to flg. 3, but holding a different position, or belong- 



ing to a different speoies. 



5. Exterior surface of a plate fonnd associated With other remains of AcanthasptSi 

 5a. Ornamented surface, ^wice natural size. 



6. Inside of plate similar to flg. 3, but detached from Its spine. 

 All flgures, except 5a, natural size. 



All onginals &om the Corniferons limestone, Sandusky, Ohio. 



