692 G. C. MARTIN TRIASSIC ROCKS OF ALASKA 



The Fauna of the Chitistone limestone of the type area as now known 

 consists wholly of marine invertebrates. The following list represents 

 provisional identifications, by T. W. Stanton, of eighteen small collections 

 from as many localities distributed throughout practically the whole 

 thickness of the formation. This list does not adequately represent the 

 entire fauna, for the collecting has been very far from exhaustive, and no 

 attempt has been made to enumerate all the species, many of which are 

 probably undescribed. 



List of fossils from the Chitistone Limestone of Hie Nisina Valley 



Local occurrence 



( 'orals Talus from lower 1,000 or 1,500 feet. 



Pentacrinus Talus from lower 1,000 or 1,500 feet. 



Terebratula Near base and talus from lower 1,000 or 



1,500 feet. 



Bpiriferina Talus from lower 1,000 or 1,500 feet. 



Avicula ? Talus from lower 1,000 or 1,500 feet. 



Pseudomonotis ? Talus from lower 1,000 or 1.500 feet. 



Halobia cf. superba Mojsisovics.. Throughout. 



HaloMa Near top and talus. 



Myophoria ? 1,200 feet above base. 



Hinnites ? Talus from lower 1.000 or 1,500 feet. 



Turbo f Near top. 



Orthoceras Near top. 



Tropites Near base. 



Tropites ? Talus. 



Juvavites ? (2 or more species) . . Near top and tains from lower 1,000 or 1,500 



feet. 



Arcestes Near base and near top. 



Arcestes ? Throughout. 



Atractites Near top. 



The Chitistone limestone of the western part of the Chitina Valley has 

 yielded the following fossils. The exact position of most of these within 

 the formation can not be stated with certainty on account of the complex 

 structure : 



List of fossils from the Chitistone Limestone of the Lakina, Kuskulana, and 



Kotsina Valleys 



Corals ? Halobia ? 



Pentacrin us Gryphwa 



Terebratula Gryphcea ? 



Spiriferina Myophoria (two or more species) 



Avicula Pecten 



Halobia cf. superba Mojsisovics Pecten f 



