SUMMARY OF RESULTS. 3] 
greater detail in the abstract of a report on the geology of the Eureka 
District, Nevada, by Mr. Arnold Hague, contained in the Third Annual Re- 
port of the Director of the United States Geological Survey. 
In the accompanying table the number of genera and species known 
at present in the Paleozoic formations of Central Nevada is given: 
sc 
c*) 
=| 2 ; 
| 3a 8 3 
lead A 2 S 
+ 6 oe no i 
Geologic horizons. >e| 2 a aa 
aea| § & a 
® sa = o 
Be leases) a=) aes | is 
ei ecolees Salas 
o a = SO HE) 5 
o am | A =) a 
= Samal 
Cambrian: -\.c- 5-2 -- sss 24 69} 32 31 CWhescese 
Silurian : | 
Pogonip eos sece: ee |-47| 99] 34] 31| 34] 16 
Trenton, etc ..-.--...- 14 15 | eee }) 1a |eseee 
Devonianees esas ee 102)} 225 119)| 61} 45 ].-.... 
Carboniferous .-........... 65 | 132 53 50 | 29 3 
Motalysse eae ee 252] 540] 242] 173! 125] 18 
Meackrrenties- dace eee 8 18 DE esse Seneca ee ee: 
Potal cenccac-se eee 244 | 522) 224] 173] 125 |..-... 
