Vol. IX] EVERMANN— DIRECTOR'S REPORT FOR igjp 387 



Accessions to the department during the year have been numerous, as 

 shown in detail in the general list of accessions. The total number of 

 specimens of birds in the Academy collection entered on the register at 

 the end of the year 1919 amounts to 31,528. 



As part of the work of this department should be included the placing 

 in dust-proof, glass-topped containers of the Academy's oological collec- 

 tion, thus making the eggs safe from damage that might result from ordi- 

 nary causes. This collection is only awaiting additional cases for its definite 

 systematic arrangement. A number of nests accompany the sets of eggs 

 and many of these have been mounted in an attractive and useful manner. 

 Press of other work having prevented the cataloguing of the eggs in 

 this branch of the department, the actual number of specimens can only 

 be approximated. 



The principal gift during the year was that of the oological collection 

 of J. and J. W. Mailliard, containing 12,431 eggs in 3,270 sets, representing 

 612 species. The Academy's oological collection now contains about 1,700 

 sets, or about 17,430 eggs. 



Some work was done in the mammalogical section of the department. 

 Collecting of rodents and other small mammals was carried on in con- 

 nection with the field work in ornithology, and some 225 specimens of 

 mammals were thus obtained from localities not heretofore represented in 

 the Academy collection, such as parts of Napa, Sonoma, Lake, Mendocino, 

 and Colusa counties. Luther Little and Wm. Heim also made specimens of 

 a number of Thomomys and Scapanus kindly brought to us by the park 

 trappers, which, with some other gifts, make the additions to the collection 

 for the year about 285 specimens. 



The additions to the collections are all recorded in the list of acces- 

 sions (pp. 389-396). 



Miss Lula Burt made good progress with the cleaning of skulls, which 

 work was later taken up by Mr. Little, so that this branch of the de- 

 partment work has been brought practically up to date. 



No opportunity has been available for classifying or arranging this col- 

 lection, and no card catalogue can be compiled until this is done. In the 

 meantime it is being well cared for, and field work will be continued in 

 conjunction, as far as possible, with that of the Department of Ornithology. 



Department of Invertebrate Paleontology 

 By G. Dallas Hanna, Curator 



The former curator of the Department, Dr. Roy E. Dickerson, continued 

 on leave of absence during the early part of the year. Geological field work 

 in Oregon, Washington, and California for one of the large oil companies, 

 however, presented an opportunity to gather a considerable amount of 

 material for the collection of the Academy which illustrates some little 

 known horizons of these states. Some field work was done in the Petaluma 

 Quadrangle and an important collection of freshwater shells from the 

 Miocene Lake Petaluma was secured and partially worked up. In April 

 Dr. Dickerson was appointed honorary curator of the Department and in 



