NO. 3 CAMBRIAN TRILOBITES 23I 



PAGE 



Acrocephalites multisegmentus Walcott 180 



Fig. 5. (X4-) Dorsal view of cranidium with short occipital spine 

 broken off. U. S. National Museum, Catalogue No. 61564. 

 Sa. (X4.) Dorsal view of a nearly entire dorsal shield. U. S. 

 National Museum, Catalogue No. 61565. 



The specimens illustrated by figs. 5 and 5a are from localities 

 son, 30 o, the Upper Cambrian: Weeks formation; 2 miles (3.2 

 km.) south of Marjum Pass, Millard County, Utah. 



Acrocephalites tutus Walcott 181 



Fig. 6. (X3-) Cranidia and free cheeks as they occur on surface of 

 shale. U. S. National Museum, Catalogue No. 6x566. 

 6a. (X4-) Enlargement of the anterior part of a cranidium to 

 illustrate frontal limb and rim, and granulated surface. 

 U. S. National Museum, Catalogue No. 61567. 



The specimens illustrated are from locality 141, Middle Cam- 

 brian : the Conasauga shale near Cave Spring, Floyd County, 

 Georgia. 



