80 



more or less extensive patches of the short summer pelage. 

 The molting period of peninsularis, therefore, nearly or quite 

 coincides with that of mexicana (cf. Mearns, 1907, 224). 



Captain Funcke took the following measurements of these 

 specimens immediately after killing them. 



Measurements 



in inches of 



eight pronghorns. 











19 



29 



3 cf 



4 cf 



5 cf 



6 cf 



7 cf 



8 cf 



Nose to base of tail along back. 



Circumference of throat 



Circumference base of neck. . . . 

 Circumference upper fore leg. . . 



Circumference of chest 



Circumference at belly 



Circumference upper hind leg. . 



50 

 13| 

 18^ 

 81 

 33| 

 37 

 13 



53 

 14 

 20 

 9 

 37 

 39 

 13| 



48 

 14 

 21 

 9 

 34 

 37 

 14 



54 

 17 

 24 

 10 

 38 

 39 

 15 



53 

 16 

 23 

 9 

 36| 

 38 

 15 



48 

 14 

 21 

 9 

 35 

 37 

 15 



47 



13| 



22 



81 

 34 

 36 

 14 



49 

 15 

 22| 



9 

 35 

 38 

 141 



Neither female has horns, and among the six male animals 

 there is not a single normal pair. Five of the bucks have 

 horns which lack true prongs, and which are short, much thick- 

 ened, and covered with clumsy excrescenses resembling rudi- 

 mentary tines. In the sixth the horns are of the usual form 

 excepting that the prongs are bent sharply inward and that 

 the right horn bears a small supplementary prong 61 mm, 

 above the first. The curve and twist of the two horns are, 

 moreover, asymmetrical. These characters show in the ac- 

 companying illustration. The dimensions in millimeters of 

 this pair of horns are as follows. 



R L 



Length of horns around curve 295 297 



Straight line, tips to base 166 196 



Girth of horns at base 147 149 



Base to superior base of prong 133 140 



Width of prong 46 50 



Spread of horns at tips , 151 



Spread at widest part 248 



Annotated List of the Birds. 



In the following list, the records of Stone and Rhoads (1905) 

 have been incorporated with my own observations. It should 

 be noted that Rhoads's expedition was made in February, 

 1905, before the Colorado River had been diverted from its 

 old bed at the eastern margin of the delta, and at about the 



