612 U. Ss. P. R. R. EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT. 
List of specimens. 
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1871|....| San Francisco.....+.. [seesersees| LEWD. Trowbridge SKU...) +200]e selec | saree |eeee ees) a be 1+ }2.5911.95)..0.[e00. Ja cctanwawe 
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3101935 .. Jt gacndae Skin ....|1.42)2.582.66 13.00) .42. 
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705). wees} San Francisco, Calieses|.. ce ceeeee| seer veer Os ce eeees- ..do 
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1171 wa |cetoens- GOs es coscevess|essicecce Lt. Williamson ....}....d0. ..\ ee. 4 { berry. 
669... -| Bodega, Cal...... Baa Feeoospees Lt. Trowbridge ....|....do... ..| T.A.Szabo 
1183) ....}---! Santa Clata, Cal.......|sesesscece Dr. J. G. Cooper ...|....do. 26 FBgnc as] ecccce vee 
2974)... |«---| Petaluma, Cal....sssees|coenssees E. Samiuels.......+ Skin,inal. 1,46)2. 
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1590)... | San Diego, Cal... .| Mar., 1856, Dr. J. F. Hammond) Skin..... baa 
1592)... | QO) |assenes d0jawes.-s . Feb.19,%56 -.do coles. 
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| ' ' 
LEPUS AQUATICUS, Bachman. 
Water Rabbit. 
Lepus aquaticus, Bacuman, J. A. N. Sc. Phila. VII, 11, 1837, 319; pl. xxii, f. 2.—Is. VIII,1,18 ,78. 
Warernuouse, N. H. Mamm. II, 1848, 112. 
Aun. & Bacu. N. Am. Quad. I, 1849, 287 ; pl xxxvii- 
Lepus douglassi, var. 1, Gray. Charlesw. Mag. I, 1837, 586. 
Sp. Cu.—Considerably larger than L. sylvaticus. Head and incisors very large. Ears scarcely half the head; hind fee¢ 
shorter than the head ; pointed ; the claws uncovered. Tail as long as the ears. Color above, yellowish brown, closely lined 
with black. Sides grayer. Tail above, rump, and legs, chestnut rusty brown. Tail beneath, and belly, cottony white; a 
black spot on the forehead. Under fur on the anterior portion of the back, without any yellowish brown tip. 
This species possesses many of the peculiar characteristics found in ZL. palustris, but differs 
by several strongly marked characters. Like it, it is aquatic in habits, and the hind feet exhibit 
the same slenderness, owing to the reduced depth of the pads; they are pointed at the toes, 
instead of being bluntly truncated, and the claws are all distinctly visible. 
This animal is of very large size, scarcely inferior in weight even to our western hares ; it is 
certainly larger than ZL. americanus. With this bulk, the very short hind feet and ears give 
to it a very peculiar appearance. The head and incisor teeth are enormously large in propor- 
tion, the latter especially. The ears are very short, but little more than half the length of the 
head ; they are very broad, and rounded at the apex. They are well covered with rather long 
hairs, not very compactly arranged. ‘The feet are very short, considerably less than the head. 
The pads are scanty, and the terminal portion of the foot is acute; the claws visible from 
above. The tail is rather unusually long, with the hairs, equalling, or exceeding the ears. 
The fur is very coarse and harsh, owing to the length and predominance of the bristly hair. 
The predominant color of the upper parts and sides is a light yellowish brown, but so much 
overlaid with black as to have this very prominent. In some specimens the black is much 
aggregated ; in others it is more uniformly distributed. The sides are considerably paler, with 
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