1/2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



Turkeytown, both in Cherokee County; and (138) shale in street 

 northeast of Printuf House, Gadsden, Etowah County, all in Ala- 

 bama. 



Upper Cambrian: (124, 124a) Nolichucky shales overlying the 

 limestone that is above the Rogersville shales, on Big Creek, south- 

 east of Harlans Knob, 4 miles (6.4 km.) northeast of Rogersville, 

 Hawkins County; also (117) Nolichucky shale; on the road north 

 from Greeneville; and (117c) Buckingham Ford, Hollis Creek, 

 5 miles (8 km.) southeast of Greeneville, Greene County, all in state 

 of Tennessee. 



Also (i38d) Conasauga shale; 3 miles (4.8 km.) west of Rome, 

 Floyd County, Georgia. 



NORWOODIA TENERA, new species 

 Plate 28, figs. 2, 2a-g 



In general form the dorsal shield of this species resembles that of 

 A^. simplex (pi. 27, figs. 3, 30), but in details it is quite distinct. It 

 has eight thoracic segments, the pleural lobes of which have a very 

 narrow pleural furrow and slightly falcate ends; a slender median 

 spine occurs on the third, fifth and seventh segments of the axial 

 lobe, as shown by figure 2e, plate 28. 



Surface minutely granular with a few larger scattered granules 

 on the cephalon, thoracic segments, and pygidium. 



The largest entire specimen has a length of 3.5 mm. 



Cranidium 1.5 mm. 



Thorax 1.5 mm. 



Pygidium 0.5 mm. 



The largest cranidium in the collection has a length of 4 mm., 

 which on the basis of the entire dorsal shield mentioned would give 

 a total length of about 9.5 mm. 



This small, neat species is abundant on two or three thin layers of 

 shaly limestone of the Weeks formation. 



Formation and locality. — Upper Cambrian : (3011) Weeks forma- 

 tion (ic of section),* also (30 o) (i& of section) ; north side of 

 Weeks Canyon, 4 miles (6.4 km.) south of Marjum Pass, House 

 Range, Millard County, Utah. 



^ Smithsonian Misc. Coll., Vol. 53, 1908, p. 178. 



