GEOLOGICAL SURVEY OF THE TERRITORIES. 467 



3. Michdinia Small irregular corallites. 



4. Syrinrjopora. 



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



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



Mystic Lake. 



7. Eemipro7iites crenistria, Phillips. 



8. Spirifer, {Martinia) Same as No. 10, Mystic Lake, and 



No. 13, East Madison Kiver. 



0. Spirifer. 



10, Uuoinphalus, (fragments.) 



BLACK-TAIL DEER CREEK, MONTANA. 



Names. Remarks. 



1. IIemipromtescrenistria,'Plu\\\ps{l)Siim(i as at Mystic Lake; Canon, 



East Madison Eiver, &c. 



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



Canon, East Madison Eiver, &c. 



3. Rhynchonella Eather small plicated, subtrigonal ; 



very abundant species. 



4. Spirifer lineatus, Martin. (?) 



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



6. Spirifer Same as No. 11, Mystic Lake. 



NORTH GROS-VENTRES BUTTE, WYOMING. 



Names. Remarks. 



1. Zaphrentis. 



2. i7e?«yjro»iYescrms^ria, Phillips (?)Same as at Mystic Lake, east side 



Madison Eiver, Bridger Peak, &c. 



3. Spirifer Same as No. 12 at ]\Iystic Lake, &c. 



4. Spirifer, [Martinia) 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 (?) Same as at Mystic Lake, Gros- Ven- 

 tres Butte, «&c. 



4. Ehynckonella 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. Hemipronites crenistria, Phillips (?) Same variety as at Mystic Lake, &e. 

 2; Prodnctusscabriculus,MaTtm{'i)s\). Do. do. 



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



L Terebratiila. 



CANON WEST OF GALLATIN RIVER, MONTANA. 



Names. Remarks. 



1. Chcvtetes Very slender ramose species. 



2. Zaphrentis. 



3. Syringopora. 



