296 FRED J. PACK 



GENUS KUTORGINA, Billings 

 KuTORGINTA, Billings, 1861: Pamphlet ^ndGeology of Vermont, Vol. II, p. 948. 

 KuTORGiNA, Davidson, 187 1: Manual of British Fossil Brachiopods, Yo\. Ill, 



P- 342- 



Kutorgina pannula, White. 



(Plate II, Figs, i, la, ib, ic) 



Trematis? pannula, White, 1874: Geographical and Geological Exploration 

 and Survey West of the looth Meridian, Preliminary Report " Invertebrate 

 Fossils," p. 6. 



Kutorgina pannula, Walcott, 1886: Bulletin No. 30, U. S. Geological Survey, 

 p. 105, Plates 7, 8. 



The writer's collection contains but one specimen of this species, 

 and it differs slightly from all of the forms thus far figured. In the 

 genus Kutorgina the hinge line extends nearly the whole width of the 

 shell. The outline of K. pannula is ''apparently subcircular or a 

 Httle broader than long; apex moderately pronounced and situated 

 near the posterior margin." This condition, as well as the charac- 

 teristic surface markings, are well shown in the specimen at hand. 

 It differs chiefly from the ones described and figured in being larger 

 and in having almost square shoulders. The writer has produced 

 in outline Walcott's figures, which, with the one of the writer's, form 

 a complete series, ranging from the type with very sloping shoulders 

 to the one with square shoulders. This feature is accompanied with 

 an increase in size. 



Location : Abe Lincoln Mine. 



CRUSTACEA 

 TRILOBITA 



GENUS BATHYURISCUS, Meek 

 Bathyuriscus, Meek, iS-j^-.Sixth Annual Report, U. S. Geographical Survey 

 of the Territories, p. 484. 



Bathyuriscus howelli, Walcott 



(Plate II, Figs. 2, 2a) 



Bathyuriscus howelli, Walcott, 1886: Bulletin No. 30, U. S. Geological 

 Survey, p. 216, Plate 30. 



Emblominus rotunda, Roem., 1887: Proceedings of the Academy of Natural 

 Sciences, Philadelphia, 1887, p. 16, PL I. 



The entire head of the creature has not been found. The pygidia^ 

 which occur in abundance, show considerable variation in form and 



