Hayden.] '^-''^ [Uay 6, 



Santa Fe, New Mexico. 



51. Hemipronites crassus, M. & H. 



52. Producius longispinus, Sow. 



53. Productus semireiiculatus, Martin, sp. 



54. Productus nodosus, Newb. 



55. Productus, (undetermined, 2 or more sp.) 



56. Productus Nehrascensis, Owen. 



57. OrtMs (undetermined). 



58. Chonetes (undetermined). 



59. Athyris suhtilita, Hall (sp). 



60. Spirifer cameratus, Morton. 



61. Spirifer Rochy-montana, Marcou. 



62. Spiriferina Kentuckensis, Shumard. 



Morav. City, Weien Mt. 



63. Productus semireticulatiis, Martin, sp. 



Salt Lake. 



64. ampophyllum. Mere fragments in hard, bluish-gray limestone. 



Note.— It is worthy of note that, although some of the species mentioned in the foregoing list 

 of Carboniferous fossils, are forms Itnown to be common to the Lower Carboniferous and the Coal 

 Measures of the Western States, they are all. with one or two exceptions, so far as they have 

 been identified, forms common in the Coal-measures of Illinois, Iowa, Kansas and Nebraslia; 

 while not a single one of them is identical with any of the species peculiar to the Carboniferous 

 limestone series helow the horizon of the Millstone-Krit in the Western States, though about 14 

 of them seem to be peculiar to the Coal-measures there. 



JURASSIC SPECIES. 



Salinas Greek. — Hot Springs. 



1. Cardinia? (undetermined).) Very poor specimens, not showing hinge. 



> Look like some Jurassic forms, but only 



2. Plioladomya (undt). ' referred provisionally to that epoch. 



Between Sacramento and Summit Station. 



3. Undt. bivalve. 



4. " univalves, 2 forms. 



5. Ammonites Nevadensis, Gabb. 



These fragments belong to the group of discoid Liasic species, with 

 keeled and bisulcated pei'iphery, and numerous very slender whorls, all 

 exposed on each side, and crossed by nearly or quite straight, simple, 

 smooth, regularly arranged costa3. They belong to one or the other of Mr. 

 Hyatt's genera — Discoceras, Arnioceras, or OpMoceras. Yery probably of 

 Liasic age. 



Weber Canon. 



6. Bivalves. Mere undeterminable casts, in a matrix like that of beds in 



the west, of Jurassic age. 



Camo. (C. L. Morcham.) 



7. Belemnites densus, M. & H. 



