242 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



DESCRIPTION OF PLATE 30 



PAGE 



Crepicephalus texanus (Shumard) . (See pi. 29, fig. 7) 209 



Fig. I. (Natural size.) Partly restored figure. Entire specimens with 



the genal and pygidium spines occtir in large numbers. 



This figure is illustrated in Monograph 32, U. S. Geological 



Survey, 1892, Part 2, plate 65, fig. 5. U. S. National 



Museum, Catalogue No. 35232. 

 la. (Natural size.) Inner side of a pygidium, showing the manner 



in which the two spines are attached to the pygidium. 



U. S. National Museum, Catalogue No. 61645. 

 lb. (Natural size.) Small cranidium with broad glabella. U. S. 



National Museum, Catalogue No. 61646. 



All of the specimens used in the restoration of fig. i and in figs. 

 10 and lb are from Upper Cambrian, (90a, 91) the Conasauga shales 

 at Cedar Bluff, Alabama. 



2, 2'. (X I-5-) Top view and side outline of a broken cranidium, 

 the broken portions of which have been restored in the 

 outline. U. S. National Museum, Catalogue No. 61647. 



2a. (Natural size.) Front portion of cranidium, showing frontal 

 limb and narrow, nearly flat frontal border. U. S. National 

 Museum, Catalogue No. 61648. 



26. (Natural size.) Fragment of a cranidium with the outline of 

 broken portions restored. U. S. National Museum, Cata- 

 logue No. 61649. 



2c. (Natural size.) Matrix and spine of a broken pygidium. 

 U. S. National Museum, Catalogue No. 61650. 



The three specimens illustrated by figs. 2, 2a-c are from (67a) 

 the Cap Mountain limestone, at the head of Clear Creek on Potato- 

 top, Burnet County, Texas. 



3, 2(1. (Natural size.) Top view and side outline of a large 

 cranidium from limestone interbedded in the Conasauga 

 shale, (89) Murphrees Valley, Blount County, Alabama. 

 U. S. National Museum, Catalogue No. 61651. 

 4, 4'. (X I-5-) Dorsal view and profile outline of nearly entire 

 cranidium. U. S. National Museum, Catalogue No. 61652. 



4a. (X I -5) Narrow form of pygidium tentatively referred to 

 this species. U. S. National Museum, Catalogue No. 61653. 



The specimens represented by figs. 4 and 4a are from locality 

 151b, Gallatin limestone, between Pebble Creek and Soda Butte 

 Creek, Yellowstone National Park, Wyoming. 



