No. 115.] 161 



(except 31 and 32), in consecutive order, together with plates 44, 

 45, 49, 50, 51 and 53 have all been written out and put in type. 

 This work has occupied much time, and is an important element 

 in forwarding the final publication of the volume. 



Recent investigations among our own collections and the great 

 amount of literature recently published upon this class of fossils 

 have shown the necessity for re-examining the generic relations 

 of the species, and the establishing of new genera. To this end 

 many specimens have been cut, and photographs of structure have 

 been made. This work, while it hinders the present or immedi- 

 ate progress of the work, will facilitate the final publication of the 

 volume. 



Vol. VII. To Include the Crustacea and the Supplementary 

 Matter upon Pteropoda and Cephalopoda. 



This volume is to comprise 325 pages of text and sixty-six plates. 

 Twenty-two plates are lithographed and printed ; two other plates 

 are in the hands of the lithographer, and one of these is completed. 

 At present one lithographer will continue at this work, while 

 the other one will complete the few remaining plates of the bryozoa. 

 Drawings are already made for about thirty plates, leaving fourteen 

 to be provided for. 



A considerable amount of manuscript, has been prepared for this 

 volume, but none of it has yet been put in form for the descriptive 

 text. 



The greater part of the species have been heretofore described 

 and the explanations of a considerable number of the plates have 

 been written and printed in the volume of Illustrations of Devonian 

 fossils. 



The volume in all its preliminary work is in fair and satisfactory 

 progress. 



Vol. VIII. Brachiopoda. 



This volume is to contain 300 pages of text and fifty-seven 

 plates. Of the latter, twenty-seven plates have been lithographed 

 and printed, and the explanation of the figures also printed. Pho- 

 tographs for illustrating the microscopic structure of the shell have 

 been prepared for about six plates, and more are yet to be made. 

 No manuscripts, except the explanations of plates, is in form for 

 the printer. 



[Assembly, No. 115.] 11 



