GEOLOGICAL SUEVEY OF THE TERRITORIES. 475 



COLORADO SPRINGS, COLORADO. 



Cretaceous, No. 4. 



Names. Remarks. 



1. Inoceramus Fragments of casts. 



2. CaUista (?) Fragments. 



3. Anisomyon alveolus, Meek. 



LAST FOOT OF BRIDGER PEAK, FOUR MILES NORTH OF FOET ELLIS, 



MONTANA. 



Names. Remarks. 



1. OpModerma (!) Bridgerensis, 



Meek.* 



2. Gryphcea , Obscure casts of a small species. 



3. Avicula Casts. 



4. Finna A rather large, narrow species, with 



longitudinal costce. 



5. Inoceramus Fragments of casts. 



6. Crassafella Casts. 



7. Panopcea (?) Fragments. 



8. Pholadomya Fragments. 



9. Turritella Casts. 



10. Gyrodes. 



CINNABAR MOUNTAIN, YELLOWSTONE YALLEY, MONTANA. 

 Names. Eeaiarks. 



1. Ostrea Casts of a small species. 



2. Inoceramus Fragments of casts. 



3. Trigonia Of Cretaceous type, nearly allied to 



4. Carimya T. Evansi, Meek. 



4. Corimya, or Thracia Casts of a small species. 



5. Baculites A small slender species, like 5. asper, 



Morton. 



6. Scaphites ventricosus, Meek. 



ROCK CREEK. 



Names. Remarks. 



1. Inoceramus. 



2. Ammonites percarinatus, H. 



and M. 



3. Ammonites, (undetermined sp.) 



4. Scaphites Warrenanus, M. and 



H. 



5. Scaphites larviformis, M. and H. 



6. Scales and other fragments of 



fishes. 



* A small Ophiurian, witli disk depressed, nearly circular, and only 0.17 inch in 

 breadth, showing on the dorsal side ten ovate-sutrigonal radial plants, that are joined 

 together over the inner ends of the arms, so as to form five pairs ; arms small, or only about 

 0.75 inch in length, and at their inner ends 0.06 inch in breadth; middle row of arm-pieces 

 on the dorsal siide, slightly wider than long, and hexagonal in form ; marginal pieces 

 aoout as large as the mi.ddle ones, seen somewhat edgewise from above, and bearing a 

 ro'.v of very small, short spines. Ventral side unknown. The specimen is not well 

 preserved. Perhaps I should call it OiMolcjy'is Bridgerensis. ' 



