196 Fretp Museum or Natura. History — Zoé.oey, Vo. X. 
Cavia (Galea), wellsi* sp. nov. 
Type from Sad Marcello, junction of Rio Preto and Rio Sapao, 
Bahia, Brazil. No. 20783 Field Museum of Natural History. Adult 
female. Collected March 19, 1914, by Robert H. Becker. Original 
number 533. 
Characters:— Similar to Cavia spixi from the catinga of eastern 
Brazil, but very slightly darker in color and markedly different in 
cranial characters, the skull being shorter and broader and the audital 
bullae larger. 
Color:— Fresh, unworn pelage: Upper parts wood brown and dusky 
finely punctulated, the hairs of the anterior part of the body deep mouse 
gray basally and with two or sometimes three annulations of wood 
brown and dusky distally; hairs of posterior part of the body paler 
basally, between mouse gray and light mouse gray of Ridgway; a light 
eye ring (tilleul buff) with a very slight interruption at the anterior 
canthus of the eye and a broadening at the posterior canthus which 
continues with slight admixture of dusky to the base of the ear and 
thence above the ear to a definite postauricular spot which is whitish 
on its lower side; inside of ears well clothed with buffy hairs; hairs of 
maxillary region with broad avellaneous tips, those of the lower throat _ 
similar but with narrower tips and with the dark basal color somewhat 
exposed; chin and fore-throat, chest, belly, and inside of legs creamy 
white, a few of the hairs along the median line without dark bases; upper 
side of fore and hind feet pale wood brown or buffy. 
Skull:— Similar to that of C. spixi, but broader, and more heavily 
ridged; audital bullae decidedly larger; ascending branches of pre- 
maxillze broader and more spatulate; supraorbital border from lacrymal 
to squamosal more elevated, especially anteriorly; lacrymal and maxil- 
lary arm of zygoma broader and heavier; posterior border of lacrymal 
with a nearly semicircular orbital process; interparietal small and 
triangular; palatine foramina short and relatively expanded; palatine 
very slightly pitted and joining maxillary evenly instead of at an angle; 
mesopterygoid fossa rounded in front; basioccipital narrow; foramen 
magnum high and narrow; cheekteeth relatively heavy; front of incisors 
creamy buff, paler than in C. spixi. 
Measurements:— Type: Total length 234; hind foot 51. Skull of 
type: Greatest length 57.5 (59.2);t basilar length 45.5 (46.1); zygomatic 
* Named for James W. Wells, author of Three Thousand Miles Through Brazil, 
and explorer of the Rio Preto in 1874. 
t Measurements in parentheses are those of a specimen of Cavia spixi (No. 
20289), from Jua, near Iguatu, Ceara, Brazil. 
