Vol. XI] EVERMANN— DIRECTOR'S REPORT FOR 1922 681 



California. Very large collections of living and fossil invertebrates were 

 collected during the four weeks the party was in the field. 



In the latter part of November, the curator and Mr. Frank M. Anderson 

 visited the Type Section of the Tejon Group at the southern end of the San 

 Joaquin Valley for the purpose of obtaining additional collections from this 

 famous fossil deposit and also to work out the stratigraphy of the region. A 

 report is in preparation on the geology and paleontology on this Eocene forma- 

 tion because it forms the basis to which all of the studies of the older Tertia- 

 ries of California must be referred. 



Satisfactory progress was made during the year in several lines of research. 

 One of the most important of these was in connection with the unpacking, 

 sorting, identifying and labeling of the enormous collection obtained in the 

 Gulf of California in 1921 by the expedition from the Academy. A conserva- 

 tive estimate of this collection is 200,000 specimens; thus far sufficient time 

 has not been available to make an accurate count. Over 300 species of living 

 marine mullusks have been identified through the aid of Dr. Fred Baker, who 

 collected the material. The collection was so large that special methods of 

 handling the great numbers of duplicates from many localities had to be de- 

 vised. At the end of the year all of the larger species had been sorted, labeled 

 and arranged systematically. 



The land shells of the 1921 Gulf Expedition were likewise assorted and the 

 collection was partially identified by the curator. 



The shortage of funds made it impossible to obtain any but a negligible 

 amount of assistance for the laboratory routine. As a consequence the cata- 

 loging of the collections in hand fell far behind the new accessions. 



Students and investigators continued to find the rich collections of the de- 

 partment of great value in their work. Members of the faculties of both 

 neighboring universities have borrowed material in certain groups from time 

 to time and there is every assurance that the co-operation thus maintained has 

 been of material benefit to all three institutions. 



The special training of the curator in microscopical paleontology enabled 

 him to assist in the making of plans and the selecting of equipment for use 

 in such work which has recently been undertaken in Stanford University. 

 And, upon the request of Professor Bruce L. Clark of the University of 

 California, two students from that institution were permitted to pursue their 

 studies in this subject at the Academy under the direct instruction of the 

 curator. A widespread interest in microscopical paleontology has recently 

 developed through its economic application in the petroleum and related in- 

 dustries. 



At the end of the year the following were the outstanding loans from the 

 department: 



Dr. Fred Baker, Point Loma, California, living mollusks from the Gulf of 

 California ; Dr. Bruce L. Clark, University of California, Eocene and OTigo- 

 cene fossils; and for his students: Merle Israelsky, living and fossil echino- 

 derms; R. N. Nelson, Martinez fossils; Mr. Marcus A. Hanna, University of 

 Washington, Eocene fossils; Dr. David Starr Jordan, Stanford University, 

 Miocene teeth of sharks; Miss Mary J. Rathbun, U. S. National Museum, 



