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REPORT ON THE PAL^EONTOLOGJCAL DEPARTMENT. 



By Alpheus Hyatt. 



Considerable work lias been accomplished in the investigation 

 of the life history of many species of Nautiloids, and a number of 

 preparations have been made of the early stages of important 

 forms. Several new genera and species have been incidentally 

 described in connection with this work, the types of which are 

 in the collections. 



The fossils necessary to fill blanks in the Systematic Collection 

 of Cephalopods have been picked out and labelled, and are ready 

 to be mounted. 



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

 tending the work of mending the fossils of the Schary Collection, 

 and for considerable work in reviewing and arranging collections. 



Three students in palaeontology engaged in special research 

 under the direction of Dr. Jackson have had the privilege of 

 studying in this department. 



A fine specimen of Triarthrus Becki has been received from 

 Dr. C. E. Beecher of Yale College which shows the antennae and 

 also a larval stage of the same species before the thoracic segments 

 have appeared. This last supplements the series of original 

 specimens in Walcott collection which begins with the stage 

 having two thoracic segments. The Museum is also indebted to 

 Dr. Beecher for a choice lot of silicified fossils from the Lower 

 Helderberg and Hamilton series, some Crinoids from Crawfords- 

 ville and a specimen of Enproops Danae from Mazon Creek. A 

 fine series of invertebrate fossils from the Tertiaries of the Atlantic 

 coast have beeu received from Prof. Wm. B. Clark of Johns 

 Hopkins University. 



The following papers have been published : — 



Trias and Jura in the Western States. B3* Alpheus Hyatt', Bull. 

 Geol. Soc. America, Vol. V. pp. 395-434. 



