HAPLODONTIDA!—SYNONYMY. OF TWAPLODON RUFUS. 557 
we should rather write Haploidus, Haplodus, or Haploudus ; but the form of 
¢dovs, in which the stem ddovr- is preserved, is so firmly established by 
precedent and custom, that it would be finical to insist upon the purer 
orthography. 
HAPLODON RUFUS, (Raf) Coues 
The Sewellel. 
Sewellel,* LEwis & CLARKE, Tray. Ist Am. ed. in 2 vols. 8vo, ii, 1814, 176 (1st English ed. in 1 vol. 4to, 
1814, 470; 2d English ed. in 3 vols. 8vo, 1815, iii, 39). (Original description.)—Covugs, Bull. 
U.S. Geol. & Geogr. Surv. Terr. 2d ser. no. 6, 1876, 437. 
Anisonyx rufa, RAFINESQUE, Amer. Month. Mag. ii, 1817, 45 (actually based entirely upon the Sewellel of 
Lewis and Clarke).—DersM., Mamma. ii, 1822, 330.—Less. Man, 1827, 240, no. 647. 
Arctomys rufa, HARLAN, Fn. Amer. 1825, 208.—Is. Guorrr., “ Dict. Classique, x, p. 186”.—GrirriTu, 
An. Kingd. v, 1827, 245, no. 636 (compiled). 
Aplodontia leporina, RICHARDSON, Zo6l. Journ. iv, 1829, 335, no, 15.—RricHarpson, Fn. Bor.-Amer. i, 1829, 
211, pl. xviii C, figs. 7-14 (skull).—Scnmz, Syn. Mamm. ii, 1840, 138 (description, &e.).— 
PEALE, Mam, & Birds U. 8. Expl. Exped. 1848, 56, “pl. xv”, fig. on p. 57 (skull).—AUDUBON 
& BacuMaN, Quad. N. Amer. iii, 1853, 99, pl. exxiii (animal). (Description and account of 
habits, mostly from Lewis and Clarke, and from Richardson.)—NEWBERRY, Pac. R. R. Rep. vi, 
1857, Zodlogy, 58 (habits, &c.).—Barrp, Mamm. N. Amer, 1857, 353, pl. xx, figs. 4 a-d (details 
of external form), and pl. xlix, figs. 2a-e (skull and teeth).—Coorrr, Pacific R. R. Rep. 
xii, pt. ii, 1860, 82 (habits).—SucK ry, Pac. R. R. Rep. xii, pt. ii, 1860, 1C0 (habits, &c.).— 
ScuckLey & Grpss, Pac. R. R. Rep. xii, pt. ii, 1860, 124 (description, habits, &c.). 
Apludontia leporina, FISCHER, Syn. Mamm. 1829, 598 (‘398 ” by error of pagination). 
Apluodontia leporina, Ricu., Sixth Ann. Rep. Brit. Assoc. for 1836, 1837, 157. 
Haplodon leporinum, WAGNER, “ Zool. Journ. 1829, —”. 
Haplodon leporinus, WAGLER, “Syst. Amphib. 1830, —”.—WaGner, ‘Suppl. Schreb. iii, 1843, 396 ”.— 
GIEBEL, Siiug. 1855, 527. 
(?) Haplodon leporinus var. californicus, Peters, Monatsb. Akad. Berlin, 17. Miirz 1864, i79 (“Gebirgen 
Californiens ”). 
Cuars.—About as large as a Muskrat. Length, a foot (more or less) ; 
. head, 3.00 inches; tail-vertebra, 1.00; tail with hairs about half as much 
again; fore foot, 1.75; hind foot, 2.10; longest fore claw, 0.50-0.60. Color 
brownish, mixed with more or less black, lighter and more grayish below ; 
basal portions of the pelage mostly plumbeous. Whiskers, claws, and upper 
surface of foot colorless, or nearly so; incisors yellow. 
Hasirat.—Washington and Oregon Territories from the Rocky Mount- 
ains to the Pacific ; upper portions of California, and probably also southern 
portions of British Columbia, 
A.—DESCRIPTION OF EXTERNAL CHARACTERS, 
The Sewellel approaches the Muskrat in size; and in some superficial 
aspects is not very dissimilar to that well known animal. The general form 
is stout and clumsy; the body is of large calibre in comparison with its 
length; the trunk is nearly cylindrical, broadly rounded off behind, in front 
*See beyond in this memoir for other forms of this Indian word, and its meaning. 
