52 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO3 



drical axis, which extends ahnost to the rear margin. Posteriorly it 

 coalesces with the pleural lobes, owing to shallowing of the dorsal 

 furrow. 



Warrior limestone; (loc. 38e) i mile northwest of Benore, and 

 5 miles west of State College, Pennsylvania. 



Holotype. — U.S.N.M. No. 108721a; paratypes, Nos. 108721b, c. 



BYNUMIA Walcott, 1924 



Bynunihi Walcott, Sinitlisonian Misc. Coll., vol. 75, No. 2, p. 54, 1924; ibid., 

 No. 3, p. 78, 1925. 



The additional species here described add proof that Bynumia is 

 a valid genus. Examples of the libragene and pygidium are also added 

 to the genus. The illustrations show that the glabella of Bynumia, 

 like that of Kingstonia, is clearly marked in exfoliated cranidia, but 

 in unexfoliated examples it is seldom indicated by more than a sug- 

 gestion of the dorsal furrow. 



Genotype. — B. eumns Walcott (restricted). 



BYNUMIA EUMUS Walcott 



Plate 9, Figures 5-7 



Bynumia eumiis Walcott, Smithsonian Misc. Coll., vol. 75, No. 2, p. 54, 

 pi. 10, fig. 2, 1924; ibid., (part) No. 3, p. 78; pi. 17, fig. 4. 1925. 



A pygidium is figured in addition to the holotype cranidium. Be- 

 cause the number, poorly written on the type cranidium, was misread, 

 its locality was erroneously given in the Sawback Range. 



Sullivan formation; (loc. 64b) head of Glacier Lake Canyon 

 Valley, 48 miles northwest of Lake Louise, Alberta. 



Holotype. — U.S.N.M. No. 70255 ; plesiotype. No. 108722. 



BYNUMIA ELEGANS, new species 

 Plate 9, Figures 8-12 



This species, represented by a large number of specimens, is close 

 to B. eimius, and hence typical of the genus in all respects. In B. 

 elegans the glabella is rather slender and more truncate than usual. 

 Its distinguishing characteristics, as in other species, reside chiefly in 

 the proportions of the brim. The brim width is equal to half the 

 glabellar length and comes to a sharper point than in B. eumus. 

 Another difference from that si>ecies is found in the occipital furrow, 

 which extends on to the posterolateral limbs. These limbs are further 



