350 DiUer — Klamath Mountain Section, California. 



and obscure, not only because of the matrix, which is often 

 considerably metamorphosed, but owing to the zoological 

 relations of the forms present. Perhaps the most diagnostic 

 fossil is an ammonite which was sent to Prof. J. P. Smith, who 

 places it in the genus Stacheoceras, remarking : 



1 While Poponoceras in the broader sense ranges from Coal- 

 measures to Middle Trias, the group of Stacheoceras has never 

 been found outside of the Permian. It is therefore probable that 

 the beds from which the Californian species was taken belong to 

 the Permian. The species appears to be new, but resembles some 

 form described by Gemmellaro from the Permian of Sicily.' 



" Fusulina also has been somewhat questionably identified. 

 It is impossible to doubt that this fauna is Carboniferous, and 

 many indications point to its being late in the epoch. It is a 

 remarkable fact that this fauna is related to those whose typical 

 area is about Baird in only the most distant degree. It is 

 quite unlike the faunas of either the Baird shales, the McCloud 

 limestone, or the McCloud shale, so far as they are known ; 

 and it seems likely that its stratigraphic position must be above 

 the McCloud shale. The apparent Permian age of this fauna, 

 and the occurrence in it of a shell probably identical with 

 Squamularia Guadalupensis Shumard and another resembling 

 Spirifer sulcifer Shumard, suggest that it may belong to the 

 fauna for which I recently proposed the regional name Guada- 

 lupian. In a general way the abundance of calci-sponges at 

 Station 702 is evidence in the same direction, although it is 

 undeniable that the common types constitute a small proportion 

 of either fauna." 



In the central part of the Klamath Mountains drained by 

 the Salmon River there are a number of limestone ledges 

 intimately associated with igneous rocks, but, as far as I am 

 aware, fossils have not yet been found in them. To the east- 

 ward, in the drainage of Scott River about Scott Valley, a 

 number of limestones occur. One near Oro Fino in Scott 

 Valley and another near Parkers, on the mountain road from 

 Gazelle to Callahans, containing pentagonal crinoid stems were 

 formerly referred to the Juratrias, but as these fossils have 

 been found in both the Carboniferous and Devonian limestones 

 further south in the Klamath Mountains, the limestones in 

 question may well be Paleozoic. This is rendered more prob- 

 able by the occurrence of well-marked Devonian in the moun- 

 tains west of Gazelle. 



Northeastern Carboniferous belt. — The northeastern Carbon- 

 iferous belt forms but a small part of the Klamath Mountains, 

 being limited to the eastern projection beyond the Sacramento 

 River in Shasta County. Although known for many years, 



