PATAGONIAN EXPEDITIONS : PALEONTOLOGY. 



EXPLANATION OF PLATE XX. 



PAGE 



CocHLOPS MURiCATUS: Fragment of carapace, X yi (No. 15,867). The specimen 

 is seen from above and shows the median dorsal band and part of the 

 left pelvic area of modified plates ; the anterior part of the carapace 

 is toward the top of the plate .... . . . .142 



(vol. v) 



