252 



CARBONIFEROUS FORMATIONS AND FAUNAS OF COLORABO. 



Taui.k X III. — 7((W(' aliiiifliKj ilixh'ihiiliiiii of t'i'iiiiKi/hriiiidii uptricK in flu' i^iiii Jiiiiii rcijiini, <iiid tlicir riiiKje 

 in the Afoln.t miil hiircr, iiiiil<Ui', mitl ii/i/n'r llcriiKixd funinilioiis — ('oiitiiuK'(l. 





2280 



2287 



2301 



2309 



2322 



2323 



2327 



J328 



2331 



2332 



2383 



2334 



2335 



2339 



Mollis. 



Hermo.sii 





Lower 



Miaaie 



Upper 



GASTEUOPODA— continued. 



































1 



1 

 ) 

 1 

 1 

 1 





































1 

 1 



1 



Kuomphalus catilloidcs 



Miiiuti? gastcropods ^ 



































































1 







".- 





























Bellf rophoii percnrinjitus; ".' 



































9 

































1 





Kupheuius nodocarinatus 



































CEPHALOPODA. 



Tainoceras sp 



































1 



CRX'STACEA. 



Phillipsia major 









! 











X 















1 





Phillipsia trinucleata 































? 



Leperditia sp 









i 

























1 







































* Also found in Rico formation. 



The Rico formation i.s part of the regular Red Beds. Its thickness is assumed to 

 be 300 feet, because this portion of the Red Beds contains Carboniferous fossils. For 

 a distance above this horizon no fossils are found, while at the top Triassic verti- 

 brates occur. The Rico formation is made up of sandstone and conglomerate, with 

 included shales and sandy, fossiliferous limestones. Our collections from the Rico 

 formation are 12 in number, and the total fauna known consists of 39 species. 

 The stations at which Rico fossils have been obtained are 2248, 2337, 2340, 2341, 

 2342, 2343, 2344, 2345, 2346, 2347, 2348, and 2349. The Rico fauna is so different 

 from that of the Hermosa formation that it has be6n deemed best to represent it on 

 a separate table, from which the local distribution of the .species can readilj' be 

 ascertained. A comparison of the Rico with the Hermosa fauna can be made by 

 means of the asterisks, which are attached in both tables to species common to the 

 two formations. 



