March cig 
1917 ALLEN 
AN EXTINCT CUBAN CAPROMYS 19) 
It is relatively much broader and flatter in ventral aspect than in C. pre- 
hensilis or in melanurus, with a deep, rounded notch on its inner outline, 
instead of being long and narrow with only a slight indication of a notch. 
In lateral aspect the broad ledge formed by the angular process is wider 
anteriorly, and bounds a deep pocket-like depression, where in other 
species of Capromys the surface shows only a shallow and evenly hollowed 
groove for muscle attachment. The incisors are pure white. 
Measurements— The type measures: alveolar length of tooth-row, 
12.5 mm.; crowns of cheek teeth, 12.2; crown length and breadth of pm, 
3.6 X 2.6; of mi, 3.0 X 3.0; of me, 2.7 X 3.2; of ms, 2.9 X 2.9; diastema, 
10.5; greatest depth from alveolus of pi, 9.0; from back of condyle to 
anterior end of socket of incisor, 35.5; from summit of condyle to ventral 
surface of angular process, 17.0. The lower tooth-row of an adult C. 
prehensilis measures 17.5 mm., and the breadth of the crowns of the molars, 
4.3. 
A fragment of a maxilla referred to this species (no. 9875) shows the 
alveoli of the three anterior teeth. These alveoli measure respectively: 
pm 3.0 K 3.0; pm; 3:0 < 3:0; m?, 3.0 < 2:9 mm. 
Remarks.— The ten jaws examined are all quite similar, and 
agree closely in the small size of the teeth, the relative lightness 
of structure, and the possession of a deeper depression in the outer 
face of the jaw, where the angular process comes off. There can 
be no doubt that they represent adults of a much smaller species 
than any heretofore known. 
It should be recalled here, that Peters, in publishing Poey’s 
description of Capromys melanurus (Monatsb. Kk. Preuss. Akad. 
Berlin, 1864, p. 384) added in a footnote: “Hr. Poey schreibt mir 
noch von einer zweiten neuen Art, C. pallidus, welche sich von 
allen anderen durch ihre geringere Grosse und die blonden, un- 
geringelten Haare unterscheidet.” This probably refers to an 
albinistic form of either melanurus or prehensilis, such as occurs 
not uncommonly with yellowish “ungeringelten” hair. Such 
individuals, as Mr. C. T. Ramsden of Guantanamo tells me, are 
believed to live in gray-barked trees. The lesser size (“ geringere 
Grésse’’) is not further specified, and may have been due to youth. 
At all events, the name C. pallidus, based on hearsay report, 
cannot be satisfactorily identified, much less applied to the small 
subfossil species here described. The latter may not have become 
