558 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 48. 



The following measurements and indices have been obtained from 

 data furnished by Nehring, Tscherski, Salensky, and from a skull 

 which is in the United States National Museum, and which was 

 obtained in southern Kashmir. 



Measurements of skulls of Equus kiang in millimeters, with indices. 



Specimens. 



Basilar 

 length. 



Vertex 

 length. 



Frontal 

 width. 



Ce- 

 phalic 

 index. 



Cranial 

 length. 



Cranio- 

 cephalic 

 index. 



Facial 

 length. 



Facio- 



cephalic 



index. 



For. 

 mag. to 

 vomer. 



Vomer 



to 

 palate. 



3874, Salensky 



5227, Salensky 



3874, Tscherski 



30, Nehring 



474 

 449 

 482 

 470 



450 



540 



508 

 544 

 525 



500 



218 

 202 

 219 

 209 



205 



46.0 

 45.0 

 45.4 

 44.5 



45.5 



166 

 167 

 169 

 169 



165 



35.0 

 35.0 

 35.1 

 35.9 



36.6 



374 



349 

 377 

 359 



345 



78.9 

 77.1 

 78.2 

 76.4 



76.7 



110 



128 

 111 

 113 



111 



113 



107 

 127 

 117 



49493, U. S. Nat. 

 Mus 



118 







Averages 



465 



523 



211 



45.3 



167 



35.5 



361 



77.5 



115 



116 



We have here a species which conforms in many respects more 

 closely to an average than does E quits herrdonus. The basilar length 

 varies in the five individuals only 32 mm., which equals not quite 

 7 per cent of the mean. The cephalic index shows a range of varia- 

 tion equaling only 3.3 per cent of the average. The cranio-cephalic 

 index presents a range of only 4.5 per cent, and the facio-cephalic 

 index one of only 3.3 per cent. 



The following table is based on measurements of eleven skulls of 

 the domestic ass. These are taken mostly from Nehring, Tscherski, 

 and Salensky. Three skulls in the American Museum of Natural 

 History furnished additional data. 



Measurements of skulls of Equus asinus in millimeters, with indices. 



Specimens. 



1, Nehring 



2, Nehring 



3, Nehring 



5, Nehring 



1136, Tscherski 



1142, Tscherski 



114, Tscherski 



1136, Salensky 



1142, Salensky 



107, Amer. Museum. 

 15675, Am. Museum. . 



Averages 



Basilar 

 length. 



353 

 360 

 360 

 370 

 365 

 370 

 401 

 362 

 365 

 390 

 425 



375 



Vertex 

 length. 



407 

 410 

 415 

 422 

 408 

 424 

 445 

 410 

 424 

 442 

 485 



427 



Frontal 

 width. 



170 

 176 

 181 

 ■191 

 166 

 173 

 190 

 167 

 176 

 182 

 200 



175 



Ce- 

 phalic 

 index. 



48.1 

 48.8 

 50.3 

 51.6 



47.8 



Cranial 

 length. 



Cranio- 

 cephalic 

 index. 



151 

 144 

 142 

 153 

 145 

 155 

 162 

 141 

 153 

 158 

 171 



152 



42.8 

 40.0 

 39.4 

 41.4 

 39.7 

 41.9 

 40.4 

 38.9 

 41.9 

 40.5 

 40.2 



40.6 



Facial 

 length. 



Facio- 

 cephalic 



index 



260 

 270 

 281 

 270 

 265 

 271 

 283 

 264 

 274 

 289 

 318 



277 



73.6 

 75.0 



78.1 

 73.0 

 72.6 

 73.3 

 70.6 

 72.5 

 75.1 

 74.1 

 74.8 



73.9 



For. 

 mag. to 

 vomer. 



80 



88 

 91 

 S6 

 87 

 86 

 99 

 87 

 86 

 95 



89 



Vomer 



to 

 palate. 



90 



95 



93 



97 



95 



98 



107 



93 



96 



107 



112 



Among the eleven individuals here represented there is a variation 

 of only 72 mm. in the basilar length and 34 mm. in the frontal width. 

 A specimen measured by Nehring had, however, a basilar length of 

 504 mm. A consideration of the cephalic index shows a greater range 

 of variation, amounting to nearly 13 per cent of the mean. The 

 extremes of variation in the cranio-cephalic and the facio-cephalic 



