PATAGONIAN EXPEDITIONS : PAL/EONTOLOGY. 



EXPLANATION OF PLATE XXI. 



PAGE 



Fig. I. Propal^ohoplophorus australis : Portion of cephalic shield (No. 



15,212). The anterior end of the shield is to the left. . . .115 



Fig. 2. EuciNEPELTUS crassus, type : Cephalic shield (No. 15,865) . . . 152 



Fig. 3. EuciNEPELTUS COMPLICATUS, type : Cephalic shield : Amer. Mus. Nat. 



Hist. (No. 9,248) . . . . 151 



Fig. 4. EuciNEPELTUS PETESTATUS, type: Cephalic shield (Ameghino collection). 149 



Fig. 5. CocHLOPS DEBiLis : Cephalic shield in place (No. 15,592); the rostrum 



has been cut off short to gain space . . . . . . .140 



Fig. 6. ? AsTEROSTEMMA DEPRESSA : Tail-sheath, X ^ (No. 16,001) . . . 154 



All figures, except fig. 6 natural size. 



(vol. v) 



