498 PALfflONTOLOGICAL REPORT OF GEOLOGICAL SURVEY. 



CODASTER ATTENNATUS. Lyon. 

 Volume 3, page 403. 

 Fig. 3. Generic figure — 1. Basal pieces. 2. Radial pieces, 1st series. 3. Ra- 

 dial pieces, 2d series. 4. Angular pieces, on the summit, occupying 

 a position in reference to the 2d radials, similar to the interradial 

 pieces in Pentremites. 

 Fig. 3a. Summit view, enlarged two diameters. 

 Fig. 3b. Profile view, natural size. 



SIDNEY S. LYON. 



