SECRETARY OF BOARD OF REGENTS. i x 



ings and the arrangement of which had been chiefly done by or under the 

 supervision of an assistant, as stated in the preface to that volume; Avhile owing 

 to the occupation of my time in the State Museum, I had been able to give 

 but a general direction to the Pal aeon tological work. It was only while this 

 volume of plates, with their explanations, was passing through the press that I 

 had an opportunity of critically studying the collections which had been made 

 and arranged for this volume, and I soon discovered that the work in 

 the Cephalopoda was so superficial and incomplete, that a thorough 

 revision would be necessary. The preparation of the material for drawing 

 and lithography was immediately commenced ; and this part of the work 

 occupied so much of my time that the completion of the descriptive matter, 

 in the same connection, was the most natural and advantageous course to be 

 pursued. 



The printing of the descriptions of the Gasteropoda and a part of the Pter- 

 opoda of the present volume was completed in 1877; and since that time, the 

 plates of Gasteropoda from 26 to 30, several plates of the Pteropoda, and 

 numerous additions to others, together with the Cephalopoda from plates 75 to 

 113 inclusive, making the entire number of 120 plates, have all been drawn 

 and lithographed. I believe that these additions will be welcomed by every 

 student of science, and without them the work would have been unworthy of 

 the liberal patronage of the State. The addition of so many plates has neces- 

 sitated the binding of the text and plates separately, but this may prove a 

 convenience in the use of the volumes. 



Volume V, Part I, Lamellibranchiata, is in a forward state of preparation, 

 eighty plates having been printed some time since. The Corals and Bryozoans, 

 following this, are also well advanced, thirty plates being already lithographed, 

 with a large number of drawings ready for the lithographer. The manuscript 

 of the descriptions of the Gorals and Bryozoans of the Lower Helderberg group 

 is already prepared for the printer, and the plates in illustration, twenty-two 

 in number, are completed and printed. The descriptions of the Bryozoa of 

 the Upper Helderberg and Hamilton groups are nearly completed ; four plates 

 have already been lithographed, and the drawings for the whole number, of 



