EXPLANATION OF PLATE 1 

 All figures natural size 



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

 formation. Specimen no. 10050. 



Fig. 2. Hipponoe calif ornica, n. sp. Side view. Lower Division of Carrizo 

 formation. Specimen no. 10055. 



[52] 



