EXPLANATION OF PLATE 2 



Fig. 1. Encope tenuis, n. sp. Actinal surface. Lower Division of Carrizo 

 formation. Specimen no. 10051. Figure natural size. 



Fig. 2. Clypeaster carrizoensis, n. sp. Abactinal surface. Lower Division of 

 Carrizo formation. Specimen no. 10048. Figure X 1%. 



Fig. 2a. Clypeaster carrizoensis, n. sp. Transverse section. Same specimen. 

 Figure X 1%. 



[54] 



