PLATE LIV. 



PARE. 



Fig. 1. AtSTEROSTEUS fSTENOCEPHALUS, Ncwb 36 



Upper surface of cranium. Natural size. 



Fig. 2. CoccosTEUs occiDENTALis, Newb 32 



Dor.sal shield. Katural size. 

 2a. Ventro-median plate, iuner surface. 



Fig. 3. CoccosTEUs cuspid.^tu.s, Agass 33 



Dorsal shield. Two-thirds natural size. 



Fig. 4. CoccosTEUs DECiPiENS, Agass 11 



■VeDtromedian ))late, external surface. 

 ia. Ventromedian plate, inner face. 

 Natural size. 



