Geol.— Vol. I.] SMITH— COMPARATIVE STRATIGRAPHY. 375 



of south from that lake; also at Wood Canyon nine miles 

 east of Soda Springs, Idaho. The writer also found it in 

 the same horizon in the Meekoceras beds of the Inyo Range, 

 east side of Owen's Valley, on the Union Wash, near the 

 Union Spring, about fifteen miles southeast of Indepen- 

 dence. In Wood Canyon, Idaho, and Union Canyon, Inyo 

 Range, California, the writer found along with it; Meek- 

 ceras gracilatitis White, M. mushbachaiium White, Pseudo- 

 sag-eceras sp. nov., Ussitria sp. no v., Ophiceras sp. nov., 

 Danubites sp. nov., Nannites sp. nov., and many other 

 forms characteristic of the Lower Trias, besides a number 

 of new genera. 



The specimens figured in this paper were all collected by 

 the writer in the Meekoceras beds of Wood Canyon, Aspen 

 Mountains, Idaho, nine miles east of Soda Springs, along 

 with the above mentioned forms, and in addition to these, 

 Flemingites sp. nov., Hedenstroemia sp. nov., Xenaspis sp. 

 nov., and a large number of other species of more common 

 genera. 



Subgenus Koninckites Waagen. 



1895. Koninckites, Waagen, Salt Range Fossils, Vol. II, Fossils from the 

 Ceratite Formation, p. 258. 



1895. Koninckites, Diener, Triadische Cephalopodenfaunen der Ostsi- 



birischen Kiistenprovinz, p. 53. 



1896. Koninckites, Toula, Eine Muschelkalkfauna am Golfe von Ismid in 



Kleinasien, p. 177. 



1897. Koninckites, Diener, Himalayan Fossils, Vol. II, Part I, Cephalopoda 



of the Lower Trias, p. 139. 

 1902. Aspidites (pars), Freeh, Lethaea Palaeozoica, Bd. II, Lieferung 4, 



P- 637- 

 Type, Koninckites vetustus Waagen, Fossils from the Ceratite Formation, 

 p. 261, pi. xxvii, figs. 4-5. 



Evolute, discoidal, laterally compressed, narrow venter, either flattened or 

 rounded, sides flattened, and entire form not robust. Umbilicus wider than 

 in typical members o{ Meekoceras s. str. , and lateral ornamentation stronger, 

 often forming coarse radial ribs or folds. Septa as in Meekoceras s. str., but 

 the auxiliary lobe is individualized, followed by an auxiliary saddle, and this 

 by a short series of denticulations, on the umbilical shoulder. 



This subgenus embraces a number of species from the 

 Lower Trias of the Salt Range, the Himalayas, Ussuri 

 Bay, and the mouth of the Olenek River in Siberia. It 



( 5 ) July ", 1904. 



