1877.] 



SENATE— No. 5. 



27 



REPORT ON CONCHOLOGY. 



By Charles E. Hamlin, Assistant in Conchology. 



The revision and determination of species of marine shells, 

 in which I have been chiefly engaged during my connection 

 with the Museum, has proceeded as regularly and rapidly 

 through the past year, as numerous interruptions have per- 

 mitted. The identification of Gasteropoda having been com- 

 pleted in September, 1875, I began work on the Lamelli- 

 branchiata the following month, and to this all time, not 

 otherwise occupied, has been devoted. 



In the early spring of this year, considerable time was 

 given to selecting and naming a series of marine shells for 

 the Synthetic collection. 



Several weeks of April and May, and part of the present 

 fall, have been given to putting in order and arranging in the 

 new glazed cases of the attic, the Tertiary, Cretaceous, 

 Jurassic, and Triassic fossils. 



At present I am engaged in arranging the Palaeozoic fossils 

 of each age by classes. With the return of spring, prelim- 

 inary labor on this part of the Palaeontological collection will 

 be completed, when it is hoped that the fossils will be well 

 secured from dust, and placed in such convenient order as 

 will facilitate access to them, and the subsequent special 

 study to which they will be submitted. In work upon the 

 fossils, I have had the efficient aid of Misses Atkinson and 

 Anthony. 



Instruction of a college class in Structural Geology and 

 Physical Geography has occupied the greater part of two 

 days of each week during term time. 



