378 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 57 



mens of the cephalon are found. A similar pygidium occurs in the 

 upper beds of sandstone near Trempealeau: (83') Upper Cambrian: 

 St. Lawrence formation ; near Trempealeau, Trempealeau County, 

 Wisconsin (Chas. Schuchert, 1893). 



The western representative of this species is Saukia coloradoensis. 



Formation and locality. — Upper Cambrian : St. Lawrence series ; 

 (85) at Prairie du Sac, Sauk County (Cooper Curtice, 1884) ; also 

 (85X) beds near Mazomanie, Dane County (Chas. Schuchert, 

 1893) ; (78b) 50 feet (15.2 m.) above St. Croix River, near the 

 landing at Osceola, Polk County (Cooper Curtice, 1884) ; and doubt- 

 fully (81) Jordan sandstone series, i mile (1.6 km.) east-northeast 

 of Devils Lake, Sauk County (L. C. Wooster, 1883) ; (8ib) Jordan? 

 sandstone, near Devils Lake, Sauk County (Cooper Curtice, 1884), 

 all in Wisconsin. 



SAUKIA FALLAX, new species 

 Plate 67, figs. 21, 2ia, 22, 22a 



This species is represented by specimens of the cranidium. The 

 form of the glabella and frontal rim relate it to S. pcpinensis, S. leu- 

 cosia, and 6". pyrcne, all of which are illustrated on the same plate. 

 It differs from the nearly related 6". pyrene and 6^. zvardi (pi. 69, 

 fi§'- 3) by having a slightly tapering glabella and smoother surface. 



Formation and locality. — Upper Cambrian: (70a) Wilberns for- 

 mation, Baldy Mountain, near Morgans Creek, 8 miles (12.8 km.) 

 northwest of Burnet, Burnet County, Texas (C. D. Walcott, 1884). 



A second species from Texas, not unlike Saukia coloradoensis 

 (p. 376), is shown by fragments occurring in a shale from San Saba 

 County. 



SAUKIA JUNIA, new species 

 Text figure 17 

 This is a species allied to both Saukia crassimar ginata (pi. 66) 

 and 6^. pcpinensis (pi. 67). It is represented by a broken cranidium 



17 



Saukia junia, new species 



Fig. 17. 



(Natural size.) Type specimen in limestone and side outline. 

 U. S. National Museum, Catalogue No. 60677. 



