Plate 70. I'TONIDES, EURYCHiaLOSTOMA 



P'iGURES la-7c. Eponidrs morani 'I'appan, new 219 

 species 



1, Holotype (USNM P4638). 2, 4, 7, Para- 

 types (USNM P4639a-c). 3, Paratype (USNM 

 P4643) with center of dorsal side obscured by 

 pyrite. 5, Paratype (USNM P4647). 6, Para- 

 type (USNM P464S). Figs. 1-4, 7 from the 

 Topagorul: formation; figs. 5, 6 from the Torok 

 formation (Topagoruk equivalent). All figures 

 a, dorsal view; b, ventral view; c, edge view. 

 Figs. 1^,7, X 112; figs. 5,6, X 75. 

 Figures 8a-llb. Eurycheilosioma robinsonacT-c\Y'Y>'An, 218 

 new species 



8, Small paratype (USNM P45S6) from the 

 Grandstand formation. 9a, Edge view of para- 

 type (USNM P4587) from the Topagoruk for- 

 mation. 9b, Ventral view. 10a, Dorsal view of 

 holotype (USNM P4584), from the Topagoruk 

 formation. 10b, Ventral view, showing broad 

 open umbilicus and ventral apertural flap. 10c, 

 Edge view, showing high spire. 11, Paratype 

 (USNM P4591) from an unnamed equivalent of 

 the Corwin formation. Figs. 8a, 11a, dorsal 

 views; 8b, lib, edge views. All X 118. 

 All figures are camera lucida drawings by Patricia 

 Isham. 



307 



