432 



NORTH AMERICAN INDEX FOSSILS. 



in the Alleghany horizon, 6 in the Conemaugh and two in the 

 Lower Permic of Kansas. The family Oryctohlattidce has 8 de- 

 scribed species in America, all but three in the Conemaugh. It 

 is characterized by its well defined anal area, a strongly compound 

 radial sector, a less copiously divided media, and a large number 

 of delicate veins, running out obliquely from the cubitus. The 

 costal area further is broad, filled with numerous branches from 

 the subcosta, similar veins extending forward from the radius, 

 while intercalary veins abound. Examples: Oryctoblattina la- 



FiG. 1734. Euccenus ovalis Scudder, Fig. 1735. Gerapompus blattinoides 

 X 2, Mazon Creek, 111. Carb. (After Scudder, Mazon Creek, 111. Carbonic, 

 Scudder.) X 2. (After Scudder.) 



queata Scudder, from the Chanute shales of Kansas City, Mo.; 

 Blattinopsis anthracina Handl. from the Conemaugh of Ohio, and 

 Pursa ovata Sellards and Sindon speciosa Sellards from the Permic 

 of Kansas. 



The family Eucaenidce contains 4 species. The costal area of 

 the wing is broad, attaining about two thirds the length of the 

 wing, the radius is reduced to few branches, while the cubital area 

 is expanded and the anal area reduced, and marked off by a curved 

 furrow. Example: Eucaenus ovalis Scudder (Fig. 1734), from 

 Mazon Creek, 111. 



The family Gerapompidce with three species has the costal area 



