150 T. E. Savage — New Species of Arthropods. 



exclusive of the spines, and 42 ram in width, and is shown in 

 fig. 4. 



The glabella is moderately convex, broadest in front, and is 

 bounded by distinct dorsal furrows. The frontal lobe is trans- 



Figs. 1-5. 



Figs. 1-3. Lepidocoleus illinoiensis n. sp., p. 149. 



1. Lateral view of the specimen showing the overlapping of the plates 

 along the ventral edge, due to compression. x 2 1/7. 



2. A portion of the dorsal edge showing the alternating arrangement of 

 the plates on the two sides, x 2 1/7. 



3. A single plate showing its asymmetry and ornamentation, x 1 1/2. 



Figs. 4 and 5. Dalmanites palaceus n. sp., p. 149. 



4. Dorsal surface of an almost complete cephalon. x 1 5/8. 



5. Dorsal surface of a pygidium. x 1 5/8. 



