464 GEOLOGICAL SUEVEY OF THE TEEEITOEIES. 



12. Conocoryphe , Undetermined fragments. 



13. Batliyurus (?) Sait/denii, Meek. . .Described in this report. 



14. Bathyurus serratus, Meek Described in this report. 



Fourth or loivest division. 



15. Cruziana * 



16. Lingula, or Lingulepis Imperfect specimens. ;!; 



17. Conocoryphe Fragments. ;"- 



18. Bathyurus, or Asaphus Fragments. 



FLAT-HEAD PASS, MONTANA. 



Names. Eemarks. 



1. Bathyurellus {DUielocephalus ?) 



truncatus, Meek Described in this report. 



2. Bathyurellus, {Asaphiscus ?) Described in this report. 



NEAR MALADE CITY, NOKTHEEN UTAH. 



Names. Eemarks. 



1. Camerella Calcifera, Billings.t 



2. Orthis hippoUte, Billings. (?)| 



3. Orthis Very finely striated and like 0. 



electra, Billings. 



4. Orthis A larger and more compressed spe- 



cies. 



5. I]uoinphalus{^.)tt'ochiscus,Meek^. 



6. Euomphalus (?) rotuliformis. 



Meek. 

 7f Euomphalus, ov Ophileta. 



8. Agnostus Josepha, Hall("?).|| 



9. Conocoryphe ., Fragments of perhaps several spe- 



cies. 



10. Bathyurellus (Asaphiscus) Brad- 



leyi. Meek Described in this report. 



11. Bathyurus Saffordi, Billings.. .Only the pygidium, but agrees ex- 



actly with Canadian specimens 

 sent by Mr. Billings. 



* The name Cruziana, d'Orbigny, 1842, (Voy. dans I'Amer. Merid., t. 3, part 2d, p. 30,) 

 having priority over Busophycus, {ByssopJiycus,) Hall, 1852, will have to be retained for 

 these curious fossils. 



t The specimens are all separate valves, more or less broken, or partly hidden in the 

 matrix ; but so far as can be seen they certainly agree well in size and all external 

 characters with Mr. Billings' species, with possibly the exception of having a some- 

 what wider and deeper mesial sinus and more prominent mesial fold. 



X Agrees pretty nearly with the Canadian shell, though its mesial sinus is somewhat 

 wider and deexier. . It may be distinct, but the specimens are too imperfect for satisfac- 

 tory comi^arison. 



§ These have been described in the Proceedings of the Academy Natural Sciences, 

 Philadelphia, Ap., 1870, p. 61, and wdll be figured in Mr. King's report. 



II The specimens of this little trilobite seem to agree closely with Professor Hall's 

 species, excepting in some of the minute and apparently variable details of the mesial 

 lobe of the head and pygidium. So far as I have been able to see, however, it would 

 also seem not to have the posterior lateral angles of the cheeks armed with little pro- 

 jecting points, as in the Wisconsin species. If these little spines do not exist in our 

 specimens, (none of which are in a condition to remove all doubts on this j)oint,) they 

 would almost certainly belong to a distinct species, in which case I would pro]Dose for 

 the name Agnostus Maladensis. 



