9 



ceous fossils, and forms considerably the larger portion of it, as the rocks 

 of this age occupy a very extensive area on the Pacific coast, and are 

 rich in fossils at many localities. A reference to the section in question 

 will show how large an amount of material, new to science, has been 

 derived from the rocks of the cretaceous series, of the existence of which 

 on this coast previous to the commencement of our work but little was 

 definitely known. 



The first and third sections of the palseontological volume were pre 

 pared by Mr. Meek ; the second and fourth by Mr. Gabb. The plates 

 are thirty-two in number, partly engraved on steel, and partly on stone, 

 from drawings furnished by the authors of the text. The volume is 

 printed and bound in a very superior manner, and Js sold at three dollars 

 and fifty cents per volume, (in cloth,) as determined by yourself and the 

 Secretary of State, which is about the cost of the mechanical execution 

 of the edition. The text is stereotyped, and one thousand copies have 

 been printed, and bound in various styles. A statement of the number 

 of copies of each volume of the publications of the survey which have 

 been sold, and of the number remaining on hand, will be furnished to 

 the Treasurer of State at the close of each fiscal year; and, at the same 

 time, the money received from the sales will be paid over to that officer, 

 unless otherwise directed by the Legislature, to be placed by him in the 

 Common School Fund of the State. The stereotype plates of the volume 

 remain for the present in charge of the printer. 



The first part of Section 1, Volume II, of the Palaeontology, is in 

 the hands of the printer. It contains the first portion of the descriptions 

 of the tertiary invertebrate fossils, by Mr. Gabb, and will soon be in 

 circulation. The plates to accompany this article, thirteen in number, 

 are drawn, and will soon be pat in hand. A considerable amount of new 

 material from rocks of the cretaceous age is also on hand and partly 

 prepared for the printer and engraver. The vertebrate fossils collected 

 by the survey have been referred to Doctor J. Leidy for description. 

 They will be worked up by him for the second volume of the Pala3on- 

 tology, and in the meantime a preliminary notice of them has been 

 received, containing descriptions of several new species of the fossil 

 horse, rhinoceros, and other large animals, and a catalogue of the whole 

 collection, which comprises remains of the mastodon, elephant, tapir, 

 bison, a reptile allied to the ichthyosaurus, crocodile, and other animals 

 of great interest. The fossil plants of the survey will be Corked up by 

 Doctor Newbe'rry, to whom portions of our materials in this department 

 have already been referred. The diatoms and other microscopic forms 

 have been submitted to Mr. A. M. Edwards, of New York. The fauna 

 and flora of the tertiary rock, with the additional matter belonging to 

 the lower formations, which has been and will be obtained before the 

 close of our work, will furnish ample material for a second volume in 

 the palaeontological department. 



IV. ECONOMICAL GEOLOGY, MINING, AND METALLURGY. 



In the geological volume just published, a considerable amount of 

 information will be found in regard to the economical geology of the 

 State ; but all the detailed descriptions of mining regions and mining 

 processes have been reserved for the volume or volumes specially 

 devoted to these subjects. We have now arrived at a stage of the 



