Blastoidocrinus carcharidens Billings 



Fig. I Photomicrograph of a portion of the type xio. This is a 

 side view of the portion of an ambulacrum shown in plate 



I.' fig- 3 

 2 Photomicrograph of a portion of the inner surface of the 

 deltoid figured in Bulletin 107, plate 5 at w 



2^2 



