Ins 



A. HYATT — GEOLOGY OF THE TAYLORVILLE REGION. 



other hand, the absence of Trigonia and the presence of close allies of 

 Ostrsea bruntrutana and of Pecten suprajurensis, shows that we have as- 

 cended in time to a younger fauna. The abundance of corals of the 

 genus Stylina, these being the most widely distributed and characteristic 

 fossils of the Hinchman tuff, shows that the age is probably that of the 

 ( 'orallian. In Europe these corals are rare in the Oolite, hut reach their 

 acme in numbers of species and forms in the ( orallian of the upper Jura. 

 The opinion expressed with regard to the age of the Bicknell sandstone 

 is greatly strengthened by this fact, and it also adds to the evidence that 

 the subdivisions of the Jura in North America and in Europe, like those 

 of the Trias, may be compared much more closely than one would at 

 first suspect *from the extremely fragmentary records heretofore found in 

 this country. 



The fossils occurred in patches and, although abundant, good speci- 

 mens were not easilv obtained. The list is as follows : 



TaylorvilU . 

 Grypha n curtici^ n. sp. 



Camptonectes bellistriatus, Meek. 



< 'hemnitzia. 



Rhacophyllites same species as in 



the Bicknell sandstone). 

 Stylina tubulifera. 



Stylina subjecta, n. sp. 



Stylina alba, n. sp. 



SI i/} inn niiiiiifii. 11. sp. 



Stylina inteynn dia, n. sp. 

 Stylina tertia, n. sp. 



Europe. 



Ostrsea bruntrutana. as figured hv de 

 Loriol ; Corallian to Portlandian. 



Pecten suprajurensis, Buvignier; Kim- 

 meridgian. 



Chemnitzia athleta, d'Orb. ; Coral- 

 lian. 



Stylina tubulifera, Ed. et H. ; Coral- 

 lian. 



Aslrea tubulifera, Goldf. ; ('orallian. 



Closely allied to a specimen in 

 Museum of Comparative Zoology 

 named S. echinulata, Lm'k. ; Coral- 

 linn. 



Resembles the Cretaceous species 

 figured by Cold fuss as Astrea gemi- 

 nala (equal S. geminata, Ed. et H.), 

 hut septa are not so symmetrical. 



Two species of Belemnites and a number of gasteropods, pelecypods 

 and brachiopods were also found in this bed. 



* I dedicate this important species to Dr. Cooper Curtice, the discoverer of this fauna. 



