32 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 93 



Middle Cambrian, Ophir, East Canyon, and (loc. 3c) Ophir, 

 Oquirrh range, Utah. 



Cotypes.— U.S.N M. nos. 15456, 15459. 



Glossopleura parabola (Hall and Whitfield) 



Ogygia parabola Hall and Whitfield, U. S. Geol. Expl. 40th Parallel, vol. 4, 



p. 245, pi. 2, fig. 35, 1877. 

 Bathyuriscus prodiictus Walcott (part), U. S. Geol. Surv. Bull. 30, p. 217, 



pi. 30, fig. le only, 1886. (See G. producta.) 

 Dolichomctopns productus Walcott (part), Smithsonian Misc. Coll., vol. 64, 



no. 5, p. 369, pi. 53, figs. 2d only (copy of original figure), 1916. 



This is a good species and should not have been included with 

 G. producta. 



Occurrence same as preceding. 

 Holotypc.—V.S.N.M. no. I5456d. 



Glossopleura packi, n. sp. 



Bathyuriscus productus Walcott (part), U. S. Geol. Surv. Bull. 30, p. 217, 

 pi. 30, figs, ic, id only, 1886. (See G. producta.) Figures copied in 

 Smithsonian Misc. Coll., vol. 64, no. 5, pi. 53, figs. 3-3b, 1916. 



Bathyuriscus productus Pack, Journ. Geol., vol. 14, p. 297, pi. 2, figs. 3-3b, 

 1906. (Also 4b which he assigned to Alokistocarc pioclicusis.) 



The cranidium of this species differs from G. producta in having 

 slightly smaller eyes and a wider glabella. On the other hand the 

 pygidium of G. packi is close to G. parabola and if we had the 

 cephalon of the latter, it also might be very similar. From G. parabola, 

 the new species differs chiefly in a more circular outline, a slightly 

 wider axis, and a relatively narrower doublure. 



Middle Cambrian, Chisholm ; (loc. 31) 3 miles northwest of Pioche, 

 Nevada. 



Holotypc and paratypcs. — U.S.N.M. no. 15455- 



Glossopleura belesis (Walcott) 



BatJiyuriscus bclcsis Walcott, Smithsonian Misc. Coll., vol. 64, no. 5, p. 338, 

 pi. 50, figs. i-i(, 1916. 



Middle Cambrian, Gordon; (loc. 4v) 6 miles up Gordon Creek, 

 Lewis and Clarke County, Montana. 

 Gofypes.— U.S.N.M. nos. 62667-76. 



Glossopleura bion (Walcott) 



Dolichomctopus bion Walcott, Smithsonian Misc. Coll., vol. 64, no. 5, pi. 52, 

 figs. 2-2C, 1916. 



There is some hesitation to placing this form in Glossopleura, but 

 the pygidium. is altogether typical as are also the eyes and palpebral 

 lobes. The difference lies in the sHghtly concave brim and expand- 

 ing glabella. 



