PLATE XXXIII. 



Figures magnified 485 diameters. 



page 



Fig. 1. Enchelydon farctus C. & L 152 



Fig. 2. Prorodon edentatus C. & L 153 



Fig. 3. Prorodon teres Ehr 152 



Fig. 4. Prorodon Lieberkuhnii Bronn 153 



Fig. 5. Coleps hirtus Ehr. An individual that has just divided, showing 



absence of armature on the anterior half 153 



