MUSEUM OF COMPARATIVE ZOOLOGY. 51 



REPORT ON THE FOSSIL INVERTEBRATES. 



By Alpheus Hyatt. 



The systematic collection of Cephalopoda has been greatly en- 

 larged. The Assistant has picked out, labelled, and placed on 

 exhibition a large number of appropriate fossils. He has also re- 

 vised the collections of Pectenidae and Monotidae, describing many 

 genera and species in preparation for a monograph of these groups. 

 This work has been finished throughout Palaeozoic and Mesozoic 

 time, inclusive of the Jura. 



The department is indebted to Dr. R. T. Jackson for a large 

 amount of work in labelling and arranging and otherwise improv- 

 ing the condition of the collections, especially the fossil Corals, 

 Echinoderms, and Cephalopods. 



Dr. E. C. Beecher has presented to the Museum one of his 

 valuable preparations of Trinucleus concentricus, showing the eyes 

 as recently described by him, and also some beautiful silicious 

 fossils from the Trenton Limestone etched out in relief with the 

 aid of acid. 



Thanks are due also to Mrs. W. D. Boardman for a fine series 

 of extremely large and interesting Hippurites from Gosau, 

 Austria. 



Several desirable specimens of Eurypteri have been received 

 from Mr. Roswell Johnson of Buffalo, and also a number of fine 

 specimens of carboniferous and cretaceous Crinoids have been 

 obtained by exchange with Professor Ward of Rochester. 



The following papers have been published : — 



" Remarks on the Genus Nanno, Clarke," by Alpheus Hyatt. American 

 Geologist, Vol. XVI., July, 1895, pp. 12, 1 Plate. 



" Terminology proposed for Description of the Shell in Pelecypoda," 

 by same. Proc. Amer. Assoc, 1895. Abstract in Am. Geol., Vol. XVI. 

 No. 4, pp. 252-254. 



