64 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
light or pale yello\v ; sides covered with a thin coat of silvery iiigment; a wide dark lateral 
stripe visible in some specimens, in others overshadowed by the general darker color; no 
darker caudal spot ; opercles and cheeks silver. Lateral line nearly straight ; scales, 8-54-7. 
Head, in length, 4; depth, 3|. Lateral line somewhat broken and interrupted on caudal 
peduncle. Measurements I'rom six adult specimens are as follows-. 
Length. 
Head. 
3)e])th. 
Lateral 
line. 
Dorsal. 
Anal. 
7nm. 
mm. 
mm. 
78 
20 
23 
53 
8 
8 
81 
20 
23-1 
54 
8 
8 
77 
18-5 
20 
53 
8 
8 
73 
18 
20— 
55 
8 
8 
72 
17-1 
20 
54 
8 
8 
1 73 
1 
1 18 
i 
20 
54 
« 
8 
2, Evarra eigenmanni, geu. and sp. nov. Body elongate, somewhat fusiform; back little elevated, 
giving an even curve to the jirotile from above eye to dorsal; belly slightly curved. Head 
small and long; snout thick aud blunt, decurved; mouth small, terminal, liorizoutal; edge 
of lower lip somewhat hardened; lower jaw included; the upper jaw slightly projecting; 
maxillary falling a little short of orbit; no barbel; eye small, 5 in head, IJ in snout, aud 2 
in interorbit.al space. Body plump; the greatest thickness just behind the extremity of 
pectorals is 10 mm., which, equals f the greatest depth. First rays of the dorsal placed 
behind veutrals, midway between snout aud fork of caudal; base of dorsal short, 7 mm., 
equaling distance from snout to middle of pupil, or a little more than depth of caudal 
peduncle at its narrowest place; longest dorsal ray, 10 mm., equals depth of head; depth 
of the body at last dorsal ray equals distance of snout to opercle, or thickness of body. 
Anal jdaced far back, 18 mm., from end of caudal peduncle, a little more than half the dis- 
tance, from dorsal to end of scales (34 mm.); base of anal, 5 mm., equaling distance from 
snout to anterior edge of orbit, its longest rays 8-1-mm., equaling length of base of dorsal, 
or distance from snout to posterior jiart of orbit. Veutrals short, 7 mm., equal in length | 
distance from origin of anal to anal opening. Pectorals inserted midway between lateral 
line aud lower line of body; length, 10 mm , about the same as the longest dorsal rays. 
Color, in spirits, smoky brown above; a narrow stripe somewhat lighter on either side 
of back, followed by a narrow aud darker lateral baud; vertebral stripe very dark ; much 
lighter below the lateral line; belly light, tinged with yellow; scales silvered from belly to 
lighter .shade on back. Fins almost plain; dorsal aud caudal dusky; the latter with a dark 
spot at base; pectorals, veutrals, aud anal, pale; opercles silvery; snoutdusky; lateral line 
straight and complete, with 88 scales, 17 rows above and 14 below ; head in length of 
body, 4; depth, 5. Three specimens measured as follows: 
! Length. 
He.ad. 
Depth. 
Lateral 
line. 
Dorsal. 
Anal. 
! mm. 
mm. 
mm. 
\ 71 
17 
14 
88 
8 
h 7 
! 04 
14 '5 
13 
80 
. 8 
I. 7 
55 
1 
13 
11 
88 
8 
1,7 
Teeth 0, 4-4, 0. The intestine is but a little more than the total length of the body. 
This species seems to be the type of a distinct genus allied to Tiaroc/a, rhcnacobius, and 
Agosia, for which I suggest the name Evarra. Evarra is distinguished I'roui Tiaroga by its 
protractile premaxillary; from Phenacobius by the form of the mouth and lips, which, with 
its small scales, also distinguish it from Xotropis. Agosia differs in the presence of a barbel. 
3. Cliirostoma jordani Woolman. 
