378 CALIFORNIA ACADEMY OF SCIENCES, [Proc. 3D Ser. 



Waagen separated this group from Cei'atites, in spite of 

 its close agreement with that genus, and placed it under the 

 Leiostraca, in spite of the coarse ribs that are often present. 

 Flemingites is confined entirely to the Lower Trias, being 

 found in that horizon in the Himalayas and the Salt Range 

 in India, and in the Aspen Mountains of Idaho, where it is 

 represented by several species. 



Flemingites russelli Hyatt & Synith ms. 



Plate XLII, Fig. 5; Plate XLIII, Figs. 5-6. 



1904 Q)Fleniingites russelli Hyatt & Smith, ms., The Triassic Cephalopod 



Genera of America, Professional Papers No. U. S. Geol. 



Sur. p. , pi. i, figs. 1-3, pi. Ixx, figs. 1-3. 



Evolute, discoidal, latterly compressed, wide umbilicus; whorls not deeply 

 embracing, outer whorl covering only one-third of the inner, and indented 

 by it to only one-sixth of the height. The increase in height of the whorls is 

 rapid. Umbilicus wide and shallow, umbilical shoulders rounded; sides gently 

 convex; venter narrow and somewhat rounded; whorls twice as high as 

 broad. 



Sides ornamented with rather strong folds on mature shells, nearly smooth 

 on young shells. Surface of shell ornamented with fine spiral lines. Septa 

 ceratitic, with four ceratitic lobes, and three rounded saddles on each side. 

 The external lobe is divided by a deep siphonal saddle; the first lateral is 

 twice as long as the external, the second lateral is narrow, and the auxiliary 

 lobe consists of four or five denticulations, forming a broad lobe. 



The spiral lines did not show on the specimen photo- 

 graphed, but were distinct on others. 



Horizon and locality. In the Meekoceras beds Lower 

 Trias, of Wood Canyon, Aspen Mountains, nine miles east 

 of Soda Springs, southeastern Idaho, associated with Meek- 

 oceras gracilitatis White, M. 7nushbachanum White, 3f. 

 aplanatum White, Aspidites, Ussuria, Ophiceras, Heden- 

 strcemia, Danubites, Nannites, and many other forms. 



Genus Beyrichites Waagen. 



1895. Beyrichites, Waagen, Salt Range Fossils II, Fossils from theCeratite 



Formation, p. 160. 



1896. Beyrichites, Arthaber, Cephalopodenfauna der Reiflingerkalke, II, 



p. 228. 

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

 Kleinasien, p. 172. 



