362 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



Brachiopoda 



Terebratula sp. nov. 



Rhynchonella sp. nov. 

 Vertebrata 



Shastasaurus^ alexa^idrce Merriam 



Shastasaurus altispinus Merriam 



Shastasaurus careyi Merriam 



Shastasaurus osmonti Merriam 



Shastasauj'us pacificus Merriam 



Shastasaurus per^rini Merriam 



Leptocheirics ^ zitteli Merriam 



Toretocnemus ^ californicus Merriam 



The fauna of the yuvavites beds differs from that of the 

 Trachyceras beds in the absence of Trachyceras, the scarcity 

 of the Snbbullatus group, and the prevalence of jfuvavites, 

 Arcestes, and Atractites. 



The fauna of the Spiriferina beds consists chiefly of 

 Brachiopoda, with a few pelecypods, corals, and crinoids, 

 hardly determinable. It is probable that the upper part of 

 the yuvavites beds and the Spirife?'ma beds belongs to the 

 Noric division of the Bajuvaric series, for the Psetidomonotis 

 slates occur just above them in the section between Squaw 

 Creek and Pitt River, and undoubtedly belong to the Noric, 

 or what Mojsisovics formerly called Juvavic. 



In a former paper the writer (31) erroneously referred 

 the Protrachyceras homfrayi beds to the Swearinger slates of 

 Diller, on account of their stratigraphic position below the 

 Halohia slates. 



But the fauna of the Protrachyceras homfrayi beds is 

 quite different, and probably belongs to the Longobardic 

 substage of the Ladinic. They contain Protrachyceras 

 homfrayi Gabb, and several other species of this group, 

 along with a number of poorly preserved pelecypods, includ- 

 ing Halohia. A further examination of the fauna in the 

 field, and in the collections previously made, failed to show 

 the presence of Psetidomonotis in the lower shales, but 

 showed it to be abundant in the shales above the Hosselkus 

 limestone. These shales outcrop between the divide and 



'See Bibliog. 19 and 19a. 

 2 See Bibliog. 193. 

 2 See Bibliog. 193. 



