50 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



DESCRIPTION OF PLATE 5 



Page 

 Neolcnus iiiflatus. new species 30 



Fig. I. A small nearly entire dorsal shield with the exception of the 

 free cheeks. U. S. National Museum, Catalogue No. 53390- 



Figs. 2 and 20. A large cranidium. U. S. National Museum, Catalogue 



No. 53389- 

 Fig. 3. A characteristic pygidium. U. S. National Museum, Catalogue 



No. 53388. 



Figs. 4 and 4a. Associated hypostoma. U. S. National Museum, Cata- 

 logue No. 53386. 



5. Enlargement of the exterior ornamentation of the surface of 

 the fixed cheek back of the palpebral lobe. U. S. National 

 Museum, Catalogue No. 53387. 



The specimen represented by figure i is from thin-bedded 

 Middle Cambrian limestones 2,300 feet (701 m.) above the 

 Lower Cambrian ; and the specimens represented by figures 

 2-5 are from thin-bedded Middle Cambrian limestones 2,140 

 feet (652.3 m.) above the top of the Lower Cambrian, both in 

 the Marjuni formation, in the ridge on east side of Wheeler 

 Amphitheater, east of Antelope Springs, Millard County, 

 Utah. 



