Clark. The Echinoderms of Peru. 



PLATE 3. 



Fig. 1. Parasterina obesa. lalcahuano, Chile. Upper surface. X f. 

 Fig. 2. Parasterina obesa. Talcahuano, Chile. Lower surface. X |. 

 Fig. 3. Paulia horricla. Galapagos Islands. Upper surface. X $ 



