828 
PEROGNATHUS (CRICETODIPUS) PARVUS.— Peale. 
P. Oapite ovato : rostro elongato, acuminato, piloso, exceptis naribus 
parvis convolutisque ; labiis magnis, tumidis, et pilis brevibus consitis : 
inystacibus plurimis, albis : floeco alborum pilorum seu setarum in mento : 
genarum ventriculis amplis, disruptis extrinsecb ori, ex supremo labio ad 
guttur usque protentis ; cavitate retrorsum ad aures pertingente pilosa : 
oculis mediocribus : auribus parvis, rotundis, pilose fimbriatis : anteriori- 
bus cruribus parvis : pede mediocri, setosis marginato pilis : unguibus 
brevibus, uncinis, excepto polliculari in orbem figurato vel ad instar 
humani : posticis cruribus longis ; pedibus magnis validisque, digitis 
quinque instructis, medio cseteris aliquantulo longiore ; intimo digito 
brevissimo, attingente tantum metatarsa casterorum ossa : unguibus omni- 
bus brevibus, acuminatis, modic^s incurvis : cauda longa, attenuate, pilis 
brevibus sericis cooperta : colore supra sepiaco-brunneo, infra albo ; 
obscura linea transcurrente genas sub oculis. 
SYNONYMES. 
Cricetodipus Parvus. — Peale, Mamm, of U. S. Exploring Expedition, p. 53. 
Perognathus Parvus. — Dr. Le Conte, Proc. Acad. Nat. Sci., Phila. 
DESCRIPTION. 
Head ovate ; the snout elongate, pointed, and covered with hair, except- 
ing the nostrils, which are small and convolute ; lips large, tumid, and 
covered with short hairs ; whiskers numerous, white ; a tuft of white 
hairs or bristles on the chin ; cheek-pouches spacious, opening outside of 
the mouth, and reaching from the upper lip to the throat ; the cavity 
extending backwards to the ears, and lined with hair ; eyes medium size ; 
ears small, round, and fringed with hairs ; fore-legs small, the feet mode- 
rate, margined with bristly hairs ; the nails short, curved, excepting that 
of the thumb, which is orbicular, or resembling the human thumb nail ; 
hind-legs long ; the feet large and strong, five-toed ; the middle one 
slightly longer than the rest ; inner to© shortest, reaching only to the end 
of the metatarsal bones of the others ; all the nails short, pointed, and 
