Length of nasals
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_L. c. curti_, type locality (K.U.)

A B C D E F G H I J K
[Female] 35470 565 55 125 115 72.0 37.1 25.9 21.2 27.4 29.8 13.5
[Female] 35471 566 57 122 122 72.8 39.0 25.5 22.0 26.2 29.2 13.9
[Female] 35472 520 50 115 105 69.5 38.6 26.0 19.0 24.4 30.2 13.5
[Female] 35473 587 53 124 118 72.0 40.9 26.7 22.2 27.4 29.0 13.0
Average 560 54 122 115 71.6 38.9 26.0 21.1 26.4 29.6 13.5
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_L. c. altamirae_, type locality (U.S.N.M., Biol. Surv. Coll.)

A B C D E F G H I J K
[Male] 93691 605 96 137 112 76.5 44.5 26.6 24.6 .... 32.0 13.0
[Female] 93692 595 71 137 114 77.1 42.5 26.3 23.1 27.0 29.5 13.4
[Male] 93693 590 93 137 110 77.8 43.8 27.6 22.5 27.2 30.7 14.2
[Female] 93694 605 70 142 118 78.0 45.9 26.8 23.4 28.7 32.0 14.3
[Male] 92982 556 59 136 114 75.9 46.5 26.1 22.3 25.8 .... 14.0
Average 590 78 138 114 77.1 44.6 26.7 23.2 27.2 31.1 13.8
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1. In each specimen of _L. c. curti_ the length of the ear measured
from the notch when the animal was in the flesh was eight
millimeters more than in the dried skin.

The cranial measurements given above are taken, in so far as possible,
in the same way that the measurements recorded by Nelson in his North
American Fauna (No. 29, 1909) were taken. In that publication he records
mostly average measurements but he records also some measurements of
individual specimens. Two of these specimens are the holotypes of
_Sylvilagus mansuetus_ Nelson and Romerolagus nelsoni Merriam. By
attempting to duplicate Nelson's measurements on these specimens, the
following opinions were formed.

"Basilar length" is basilar length of Hensel and the anterior
point probably was the posterior border of the alveolus of incisor
two. There is some evidence of lack of consistency with respect to
the anterior control point.

"Length of nasals" is the overall length, of the two nasal bones,
but in _Romerolagus_ the shorter (right) nasal alone seems to have
been measured.

"Breadth of rostrum abo