NO. 3 CAMBRIAN TRILOBITES 219 



pygidia differ from those referred to C. camiro (pi. 32, fig. 2a), 

 being more transverse in outline and having three rings in the axial 

 lobe. 



Formation and locality. — Upper Cambrian: (124a) Nolichucky 

 shale; on Big Creek, 4 miles (6.4 km.) northeast of Rogers, Haw- 

 kins Comity, Tennessee ; also (124b) Nolichucky shale : near Good- 

 wins Ferry, Giles County, Virginia. 



AMPHION ? MATUTINA Hall 



Plate 26, fig. 8 



Amphion ? matutiiia Hall, 1863, Sixteenth Ann. Rept. State Cab. Nat. 



Hist., p. 222, pi. 5 A, fig. 6. (Original description and illustration.) 

 Amphion ? matutina Hall, 1867, Trans. Albany Inst, Vol. 5, p. 194 (A 



reprint of the paper of 1863.) 



This species is illustrated, as the specimen in the collection shows 

 that there was an occipital spine, also small palpebral lobes opposite 

 the center of the glabella. The species appears to belong to an 

 undetermined genus, but at present I do not wish to base a new 

 genus on the broken cranidium. 



Formation and locality. — Upper Cambrian: (84) Eau Claire 

 formation ; Dresbach, Winona County, Minnesota. 



The specimen described by James Hall came from the lower beds 

 near Trempealeau, Wisconsin, which also contains Crepicephalus 

 iou'cnsis, a form found with A. ? matutina at Dresbach. 



Genus WANNERIA Walcott 



Wanncria Walcott, 1910, Smithsonian Misc. Coll., Vol. 53, pp. 296-298. 



WANNERIA WALCOTTANA (Wanner) 



Plate 38, figs. I, 2 



Olenellus (Holmia) walcottanus Wanner, 1901, Proc. Washington Acad. 

 Sci., Vol. 3, pp. 267-269, pi. 31, figs. I, 2; pi. 32, figs. 1-4. (Described 

 and discussed as a new species.) 



Wanneria walcottanus Walcott, 1910, Smithsonian Misc. Coll., Vol. 53, pp. 

 302-304, pi. 30, figs. 1-12; pi. 31, figs. 12, 13. (Changes generic refer- 

 ence. Comments upon and illustrates species.) 



Through the courtesy of Mr. Noah Getz and Dr. H. Justin Roddy 

 .1 had the opportunity of photographing a cephalon of this species 

 that has an unusually well-preserved surface. The cephalon has a 

 length of 9.5 cm. and a width at base of 15.5 cm. The reticulated 

 surface is essentially of the same character as that on a thoracic 

 segment and hypostoma of this species from near York, Pennsyl- 



