HAPLODONTID“—GENUS HAPLODON. 555 
dence of an “early” or “generalized” type, in comparison with the highly com- 
plicated teeth of many recent Rodents; no simpler tooth than the anterior 
upper premolar—a mere cylinder—can well be, while the other molars are 
simply cylinders pinched intoa fold on one side; being thus remotely removed 
from such remarkably intricate and “specialized” aggregations of numerous 
prisms as are shown by many recent Rodents. 
Genus HAPLODON, (Rich.). 
x Anisonyx, sp., RAFINESQUE, Amer. Month. Mag. ii, 1817, 45 (genus based on a species of Cynomys, with a 
species of Haplodon included). 
= Aplodontia, Ricuarpson,* Zool, Journ, iv, 1829, 334 (original characterization).—Ricu., Fn. Bor.- 
Am. i, 1829, 210 (substantially the same).—AUDUBON & BACHMAN, Quad. N. Am. ili, 1853, 
98 (copied from Richardson).—Batrp, Mamm. N. Amer. 1857, 350 (elaborately recharacter- 
ized). 
= Apludontia, FiscnER, Syn. Mamm. 1829, 598 (“ 398” by err. of pagination). 
= Haplodon, WaG irr, Syst. Amphib. 1831, 23.—WaGNner, “Suppl. Schreb. iii, 1843, 395”.—PrTERs, 
Monatsb. Akad. Berlin, 1864, 177 (discussion of affinities)— ALSTON, Proc. Zod]. Soc. 1876, 78 
(classificatory). 
== Apluodontia, RICHARDSON, Sixth Ann. Rep. Brit. Assoc. Adv. Sci. for 1836, 1837, 150, 157. 
= Haploodon, or Hapludon, Brannt, “ Beit. Kennt. Siug. Russ]. 1855, 150”. 
= Haploodon, LIsJEBORG, Syst. Overs. Gnag. Diiggdj. 1866, 42. 
(Other forms of the word are doubtless to be found.) 
Cuars.—Form stout, heavy, low; body cylindrical ; limbs short, of pro- 
portionate lengths before and behind; no appreciable neck; head broad, flat, 
somewhat triangular, with blunt muzzle, hairy, except the margin of the 
nostrils and cleft of the upper lip. Tail very short, terete, hirsute. Whisk- 
ers very long, bristly. No cheek-pouches. Eyes diminutive. Ears of 
moderate size, rounded above, lobate below, with antitragal fold. Fore and 
hind feet pentadactyle, hairy on top; palms and soles naked; former 5-tuber- 
culate, latter 6-tuberculate; digits of hind feet not webbed; fore claws much 
longer and stouter than the hinder, fitted for digging. Pelage of two kinds,— 
long bristly hairs and woolly under fur. Progression apparently plantigrade. 
Habits terrestrial, fossorial, gregarious. Regimen exclusively vegetarian. 
Voice shrill. 
To the structural characters already given, being those upon which a 
family Haplodontide is established, may be added the foregoing, derived from 
* Special paper: On Aplodontia, a new genus of the order Rodentia, constituted for the reception 
of the Sewellel, a burrowing animal which inhabits the north-western coast of America, < Op. tom. cii. 
pp. 333-337, 
On a second described species of Haplodon, cf. Peters, Ueber neue Arten der Siiugethiergattungen 
Geomys, Haplodon und Dasypus. < Monatsb, Akad. Wiss. Berlin, 1864, pp. 177-180. 
A third special paper is: The Hunting Fields of the Pacific Coast, Oregon. Capturing the Showtl. 
By J.M. Murphy. <“ Rod and Gun” (newspaper) of May 20, 1876. [Popular. ] 
