29 
He has also finished the Belemnoids and Sepioids in a similar 
way, and these collections are practically completed. Specimens 
have also been picked out for exhibition in the Systematic and 
Geological collections, and the Belemnoids and Sepioids have 
been mounted. 
He has also done considerable work upon the Jurassic and 
Cretaceous Ammonoids, and these are rapidly approaching 
completion. 
Mr. Jackson has brought together and arranged the Creta- 
ceous and Tertiary Ostreade, and incidentally done a large 
amount of work of a preliminary kind upon the general collec- 
tion of Lamellibranchs, especially upon the Jurassic forms. He 
has also reviewed and placed in safe condition the specimens of 
the Green collection, which consists of exceedingly delicate de- 
calcified fossils that require very careful storage. The entire 
collection of Tertiary Gasteropoda has been reviewed and con- 
centrated, and the outside labels revised and corrected. He has 
also reviewed the collection of Echinoderms, revising and cor- 
recting the outside labels, and cleaning a part of the specimens. 
Mr. Henry Brooks has arranged and concentrated a portion 
of the Anticosti collection, by culling out the worthless material, 
and has finished the arrangement of the Gebhard collection, 
which was begun last year. He has also worked over and dis- 
tributed the Keeping collection of Jurassic, Cretaceous, and 
Tertiary fossils from England, the Tawney collection, consisting 
of a few trays of Cretaceous fossils from England, and the col- 
lection mentioned below as turned into the department by 
Dr. Hagen. 
Cigar boxes have been found very convenient for the storage 
of certain kinds of fossils. A large number have been used in 
place of paper trays wherever they are more convenient, as in 
the storage of duplicates; and they will not only effect a saving 
of expense, but will also save a large amount of room. 
Dr. Hill of Princeton spent a few weeks at Cambridge in pre- 
paring the bones of a fine skeleton of Mylodon for exhibition. 
A small collection of fossil Insects, Myriapods, and some mis- 
cellaneous specimens, have been received from Dr. Hagen. They 
were mostly from Mazon Creek. A small collection of fossil. 
plants from the Coal Measures at Springhill, Nova Scotia, has 
been presented by Mr. Henry Swift. 
