18 



ANNUAL REPORT OF THE 



REPORT ON INVERTEBRATE PALAEONTOLOGY. 



By Alphecs Hyatt. 



The revision of the genera of fossil Cephalopods has been com- 

 pleted from the Trias to the Present period, the fossils rearranged 

 and placed in better shape as regards labelling. 



The results of this work will appear in the Text Book of 

 Palaeontology by Karl A. von Zittel, chapter on Cephalopoda, 

 now in press. 



The department is indebted to Dr. R. T. Jackson for the selec- 

 tion of materials to be placed on exhibition in the Stratigraphic 

 collection. This gentleman also spent considerable time in re- 

 viewing and improving the condition of the Mesozoic and greater 

 part of the Tertiary Gasteropoda. 



Mr. A. W. Grabau was permitted to study the Tertiary Fusidse. 



Mr. Charles Schuchert reports progress on the Palaeozoic Star- 

 fishes loaned to him, and expects to finish his work at an early 

 date. 



The following papers have been published: — 



Cycle in the Life of the Individual (Ontogeny) and in the Evolution 

 of its own Group (Phylogeny). By Alpheus Hyatt. Science, Jan., 

 1897, pp. 1G1-171, and same with emendations, Proc. Am. Acad. Arts 

 and Sciences, Vol. XXXII. , March, 1897. 



Localized Stages in Development in Plants and Animals. By Dr. R. T. 

 Jackson, Mem. Bost. Soe. Nat. Hist. Vol. V., 1899, pp. 89-153, with 

 plates 16-25. 



