410 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 57 



DESCRIPTION OF PLATE 69 



PAGE 



Saukia wardi Walcott 384 



Fig. I, (Natural size.) Small slab with cranidia, free cheeks, and 

 pygidia. U. S. National Museum, Catalogue No. 58671. 

 2. (Natural size.) Small slab with matrices of cranidia and free 

 cheeks, also pygidia and thoracic segments. U. S. National 

 Museum, Catalogue No. 58672. 

 The specimens represented by figs, i and 2 are in the collection of - 

 the Yale University Museum, New Haven, Connecticut. The plasto- 

 types in the U. S. National Museum bear the locality number 346f, 

 Upper Cambrian: Natural Bridge limestone, 1.5 miles (2.4. km.) 

 north-northeast of Natural Bridge, Virginia, in calcareous shale 

 in Shenandoah limestone. 



Saukia stosei Walcott. ( See pi. 70) 384 



Fig. 3. (X 3-) Surface of limestone with cranidia, free cheek, and 

 pygidium weathered out in relief. U. S. National Museum, 

 Catalogue No. 58673. 



4- (X 3-) Side view of cranidium and free cheek of fig. 3. 



5- (X 3-) Another view of the pygidium of fig. 3. 



The specimens represented by figs. 3-5 are from locality 59 0, 

 Lower Ozarkian (Ulrich) : Conocheague limestone, about 800 feet 

 (240 m.) above the base of the formation in a limestone quarry 

 on point of spur northwest of Scotland Station, Franklin County, 

 Pennsylvania. 



