6 CHARLES MIDLO AND HAROLD CUMMINS 



prints, but preservation almost invariably renders the skin 

 unfit for printing. It was necessary, therefore, to resort to 

 drawing, as explained on page 23. Prints were made of a 

 few preserved specimens as well as a small number of living 

 or freshly dead animals. Such prints were interpreted accord- 

 ing to customary dermatoglyphic procedures, the result in 

 each instance being transferred as a drawing within a standard 

 outline as in the examples illustrated. Observations were 

 made on the character of the pads and on other relevant 

 features such as flexion furrows and the occurrence of areas 

 presenting a lack of ridge formation ; these were recorded in 

 the form of notes and sketches. 



The writers are indebted to a number of individuals and 

 institutions for opportunity to obtain the materials for this 

 study, and to the National Research Council for a Fellowship 

 (Midlo) which made it possible to assemble records of material 

 in several collections. We are particularly grateful to Dr. 

 Adolph H. Schultz of the Johns Hopkins University, who made 

 available during the tenure of the Fellowship the facilities of 

 his laboratory and entire primate collection. Doctor Schultz 

 also was so kind as to read the manuscript of this study and 

 to offer invaluable suggestions bearing on terminology of 

 primates and on the habits of several forms. We wish to 

 acknowledge, further, the courtesies of access to material 

 extended by the American Museum of Natural History, The 

 Wistar Institute of Anatomy and Biology, the United States 

 National Museum, the College of Physicians and Surgeons of 

 Columbia University, the Bronx Zoological Garden, and the 

 Johns Hopkins School of Hygiene and Public Health. For 

 personal gifts of specimens we thank Dr. Ernest Carroll 

 Faust of Tulane University and Dr. Dudley J. Morton of 

 Columbia University. Finally, an expression of special grati- 

 tude is extended to Miss Genevieve Lee, who prepared for 

 reproduction finished copies of the many original drawings 

 and composed the lettered tables. 



