XIV U. S. NATIONAL MUSEUM BULLETIN 2 06 



Miiller, H. W. Parker, E. R. Dunn, and Helen T. Gaige, for furnishing 

 useful notes and comparing numerous specimens, and to the many 

 others who helped in various ways, go my warmest thanks. 



Characters are described in the same order for each species, thus 

 making it possible to compare species readily. Critical measurements 

 of the most stable physical features were taken as follows: 



Head and body (total length): The straight distance from snout tip 

 to end of body, measured by dividers or calipers. 



Head length: The distance from tip of snout to posterior border 

 of tympanum, measured directly with dividers. In frogs having no 

 visible tympanum the head length was taken from tip of snout to 

 posterior end of maxilla. 



Head width: The greatest width of the head, usually from a point 

 between eye and tympanum to a corresponding point on the opposite 

 side of head, measured directly with dividers. Some species, such as 

 Bujo typhonius, have bony processes at the angles of the jaw; these 

 are not included in the measurement of head width. 



Femur: The femora having been placed at right angles to the body 

 axis, the distance between the centers of the Imees is taken with 

 dividers. One-half this measurement is taken as the length of a 

 single femur. This method gives greater accuracy than the customary 

 anus-to-knee measurement. 



Tibia: The distance from center of knee to center of heel. 



Foot: The distance from tip of fourth toe to distal margin of inner 

 metatarsal tubercle. As the distance from tubercle to heel is not 

 included, this measurement is short of the actual foot length. 



Hand: The distance from tip of third finger to base of first finger. 

 In some instances the length of the fore leg (distance from tip of third 

 finger to axilla) and hind leg (distance from tip of fourth toe to groin) 

 is given. 



The following abbreviations were used in identifying the specimens 

 examined : 



AMNH American Museum of Natural History, New York City 



ANSP Academy of Natural Sciences of Philadelphia 



BM British Museum (Natural History), London 



CAS California Academy of Sciences, San Francisco 



CM Carnegie Museum, Pittsburgh 



CMNH Chicago Natural History Museum, Chicago 



DZSP Departmento de Zoologia, Secretaria da Agricultura, SSo 



Paulo 

 FMNH Field Musuem of Natural History (now Chicago Natural 



History Museum) 

 IB 'Instituto Butantan, Sao Paulo 



IOC Instituto Oswaldo Cruz, Rio de Janeiro 



