496 GEOLOG-Y OF THE YELLOWSTONE NATIONAL PARK. 



Spiriferina solidirostris, Liorhynchus haguei n. sp., Camarotoschia metallica, 

 Productella cooperensis, Chonetes omatus, Orthothetes inflatus, Crania Icevis, 

 Ptilopora sp., Fenestella sp. Of these L. haguei, Naticopsis (?) sp., Platyceras 

 sp., Crania Icevis, Ptilopora sp., and Fenestella sp. have not been identified 

 elsewhere in the Madison limestone, with whose fauna, however, that of 

 these localities is very closely related. 



The red beds exposed at the head of Conant Creek, Teton Range, may 

 also be separated from the Madison limestone, with which lithologically as 

 well as faunally they are slightly connected. The matrix is a red cal- 

 careous shale, more shah" than is common in the Madison limestone, in 

 which the fossils are, as a rule, very badly crushed. The fauna, which 

 is scantily known and, on account of the condition of the material, 

 inadequateh" identified, consists of Semimda madisonensis n. sp., Spirifer 

 marionensis (?), Orthothetes sp., and Eridopora (?) sp. None of these is 

 unquestionably identical with species found in beds below, though they are 

 perhaps questionably distinct. This locality is provisionally referred to 

 bed 32, the highest in the formation. More evidence may show it to be 

 later than the Waverly. 



DESCRIPTIONS OF SPECIES. 



DEVONIAN. 

 CCELENTERATA. 



ACTINOSTROMA Nicholson, 1886. 



xlCTINOSTROMA Sp. 



At least one species of Stromatoporoid is represented in this collection; 

 but the material, badly weathered and poorly silicified, scarcely affords the 

 promise of more than a generic identification. Therefore it has not been 

 studied by means of microscopic sections. A careful examination shows a 

 laro-e concentrically laminate ccenosteum. The lamina? are more or less 

 contorted, and the division into latilaminse is not apparent. The very fine 

 laminae are connected by minute radial pillars, which on favorably exposed 

 surfaces are seen to be continuous. This is the well-known characteristic 

 structure of the genus Actinostroma, very abundant in Devonian strata in 

 both hemispheres. 



