420 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



DESCRIPTION OF PLATE 49 



PAGE 



Bathyuriscus (Poliella) baliis Walcott 350 



Fig. I. (X2.) Diagrammatic outline restored from distorted and 



compressed specimens. 



la. (Natural size.) Diagrammatic outline from a distorted dorsal 



shield preserving the median spine of the thorax. U. S. 



National Museum, Catalogue No. 62654. 



lb. (X2.) Cranidium. U. S. National Museum, Catalogue No. 



62655- 

 If. (X2.) Broken cranidium and compressed thoracic segments. 



U. S. National Museum, Catalogue No. 62656. 

 id. (X2.) Crushed cranidium. U. S. National Museum, Cata- 

 logue No. 62657. 

 le. (Natural size.) Laterally compressed dorsal shield. U. S. 

 National Museum, Catalogue No. 62658. 

 ♦ i/. (X2.) Dorsal shield longitudinally compressed. U. S. Na- 

 tional Museum, Catalogue No. 62659. 

 ig. (X2.) Dorsal shield obliquely compressed and distorted. 

 U. S. National Museum, Catalogue No. 62660. 

 All the specimens represented by figs. i. la-g, are casts in a fine 

 argillaceo-arenaceous shale, at localities 48, 48d, Middle ? Cam- 

 brian : York ? formation ; City of York, York County, Pennsylvania. 



Bathyuriscus baiitius ^^'alcott 336 



Fig. 2. (X2.) Cranidium. U. S. National Museum, Catalogue No. 

 62661. 

 2a. (X2.) Pygidium associated with specimen represented by 



fig. 2. L'. S. National Museum, Catalogue No. 62662. 

 2b. (X2.) Associated hypostoma. U. S. National Museum, 



Catalogue No. 62663. 

 2c. (Natural size.) A large associated pygidium. U. S. National 

 Museum, Catalogue No. 62664. (n-) 

 The specimens represented by figs. 2, 2a-b, are from a shaly sand- 

 stone of locality 12b, Middle Cambrian: Rome formation; 12 miles 

 (19.3 km.) northeast of Knoxville ; and fig. 2c, from the same for- 

 mation (locality 11), i mile (1.6 km.) east of Post Oak Springs, 

 Roane County, both in Tennessee. 



Bathyuriscus sp. undt. ( I ) 348 



Fig. 3. (X2.) Cranidium. U. S. National Museum, Catalo-iue No. 

 6266B. 

 3a. (Natural size.) Pygidium. U. S. National Museum, Cata- 

 logue No. 62666. 

 The specimens represented by figs. 3 and 2a are from locality 

 i6e, Middle Cambrian: Shales of Conasauga formation; railway 

 cut I mile (1.6 km.) southwest of Piedmont, Calhoun County, Ala- 

 bama. 



