GEOLOGICAL SURVEY^ OF THE TERRITORIES. 467 



3. Michelinia Small irregular corallites. 



4. Syringopora. 



5. Chonetes Same as No. 7, Mystic Lake. 



6. Productus Like P. scahriculus, same as No. 9, 



Mystic Lake. 



7. Hemqn'onifes crenistria^ Phillips. 



8. Spirifer, [MarUnia) Same as No. 10, Mystic Lake, and 



•No. 13, East Madison Eiver. 



9. Spirifei'. 



10, Uuomphaliis, (fragments.) 



BLACK-TAIL DEEE CREEK, MONTATs^A. 



Names. Remarks. 



1. Hemi2)ronitescre7iistria,Thi\\i^s{'^i)^ame as at Mystic Lake; Canon, 



East Madison Eiver, &c. 



2. Chonetes Same as No. 7, Mystic Lake ,• No. 8 



Caiion, East Madison Eiver, &c. 



3. Rlii/nchonella Eather small plicated, subtrigonal ; 



very abundant si^ecies. 



4. Spirifer lineatus, Martin. (?) 



5. Spirifer Same as No. 12, Mystic Lake. 



6. Spirifer Same as No. 14, Mystic Lake. 



NORTH GROS-VENTEES BUTTE, WYOMING. 



Names. Remarks. 



1. Zaphrentis. 



2. Eemipronitescrenistria,'Phi[[i])s{T)^a:me as at Mystic Lake, east side 



Madison Eiver, Bridger Peak, &c. 



3. Spirifer Same as No. 12 at Mystic Lake, &c. 



4. Spirifer^ [MarUnia) Same as No. 10 at Mystic Lake, &c. 



FLAT-HEAD PASS, MONTANA. 

 Names. Remarks. 



1. Zaplirentis A small arcuated turbinate form. 



2. Syringopora.^ 



3. Hemipronites crenistria, Phil- 



lips (1) Same as at Mystic Lake, Gros- Ven- 

 tres Butte, &c. 



4. Wiynchonella Fragment rather large, strongly pli- 



cated species. 



5. "Spirifer Same as No. 12, Mystic Lake, &c. 



NORTH SIDE HENRY'S LAKE, IDAHO. 



Names. Remarks. 



1. Sew? ip^'ow^^e.screjwsfna, Phillips (!) Same variety as at Mystic Lake, &c. 



2. ProfZwc^ia sc«&ncwZMS, Martin ('?)sp. Do. j do. 



3. Spirifer Same as No. 12, Mystic Lake, &c. 



i. Terebratula. 



CANON WEST OF GALLATIN RIYEE, MONTANA. 



Names. Remarks. 



1. Chcetetes Very slender ramose species. 



2. Zaphrentis. 



3. Syringopora. 



